conductor(deob_pass3): probability_logic - Cox bivaluation + Bayesian lattice in Python
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"""probability_logic.py - Pass 3 projection of the "Probability Theory is an Extension of Logic" lecture.
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PURPOSE
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-------
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A small Python program that demonstrates the constructive form of the
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lecture's three parts (Critique of frequentism, Construction of probability
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from logic, Bayesian inference as natural consequence) using the manual_slop
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convention (1-space indent, type hints, no comments, Result[T] for errors).
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The program illustrates:
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- Frequentist definition: re-encoded as a Stream (the bounded form of "infinity")
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- Bayesian plausibility: P : (Proposition, Context) -> Plausibility : float
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- Implication ordering: the Boolean algebra over propositions
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- Lattice operations: join (OR) and meet (AND) on propositions
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- Bivaluation: Z(x, t) : float (the generalized zeta / indicator function)
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- Sum rule and product rule (the laws of probability)
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- Bayes' rule as a derived consequence of the product rules
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ENCODING (per lexicon v2 Rule 5)
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--------------------------------
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Plausibility : float (placeholder), resolved as float64 for the lattice operations
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Probability : float (placeholder), resolved as float64 for Bayes' rule
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Stream : Stream A = nat -> A (per the boundedness rule)
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SEE ALSO
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--------
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probability_logic_translation.md : math-to-Python translation table
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probability_logic_decoder.md : per-term decoder (tier-categorized)
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probability_logic_notes.md : decisions, alternatives, overrides
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lexicon.md (the v2 lexicon) + product-guidelines.md (manual_slop)
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"""
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from dataclasses import dataclass, field
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from typing import Callable, Iterable, TypeAlias
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from itertools import product as cartesian_product
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import math
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Plausibility: TypeAlias = float
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Probability: TypeAlias = float
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Stream: TypeAlias = "Callable[[int], float]"
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@dataclass(frozen=True)
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class Proposition:
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name: str
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truth: bool
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@dataclass(frozen=True)
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class Context:
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name: str
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@dataclass(frozen=True)
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class LatticePoset:
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elements: tuple[Proposition, ...]
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implies: Callable[[Proposition, Proposition], bool]
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def join(self, a: Proposition, b: Proposition) -> Proposition:
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for elem in self.elements:
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if self.implies(a, elem) and self.implies(b, elem):
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return elem
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raise ValueError(f"join not found for {a.name}, {b.name}")
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def meet(self, a: Proposition, b: Proposition) -> Proposition:
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for elem in self.elements:
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if self.implies(elem, a) and self.implies(elem, b):
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return elem
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raise ValueError(f"meet not found for {a.name}, {b.name}")
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def bivaluation(x: Proposition, t: Context, world: dict[Proposition, bool]) -> Plausibility:
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is_true: float = 1.0 if world.get(x, False) else 0.0
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context_match: float = 1.0 if t.name == "default" else 0.5
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return is_true * context_match
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def frequentist_relative_frequency(count: int, total: int) -> Plausibility:
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return count / total if total > 0 else 0.0
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def frequentist_stream(coin_flips: Stream) -> Stream:
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def at(n: int) -> float:
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total: float = 0.0
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heads: float = 0.0
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for i in range(n + 1):
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outcome: float = coin_flips(i)
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total += 1.0
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if outcome > 0.5:
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heads += 1.0
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return heads / total if total > 0 else 0.0
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return at
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def sum_rule(joint: Callable[[Proposition, Proposition], Plausibility],
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propositions: list[Proposition]) -> Plausibility:
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total: float = 0.0
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for p in propositions:
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for q in propositions:
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total += joint(p, q)
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return total
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def product_rule(p_a: Plausibility, p_b_given_a: Plausibility) -> Plausibility:
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return p_a * p_b_given_a
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def bayes_rule(p_h: Plausibility, p_e_given_h: Plausibility, p_e: Plausibility) -> Probability:
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if p_e == 0.0:
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return 0.0
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return (p_h * p_e_given_h) / p_e
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def marginalize(joint: Callable[[Proposition, Proposition], Plausibility],
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hypothesis: Proposition, observations: list[Proposition]) -> Plausibility:
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total: float = 0.0
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for obs in observations:
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total += joint(hypothesis, obs)
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return total
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def jaynes_policeman_burglar(p_burglary: Plausibility = 0.001,
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p_earthquake: Plausibility = 0.002,
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p_alarm_given_burglary: Plausibility = 0.95,
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p_alarm_given_earthquake: Plausibility = 0.29,
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p_alarm_given_neither: Plausibility = 0.001) -> Plausibility:
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p_alarm: float = (
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p_burglary * p_alarm_given_burglary
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+ p_earthquake * p_alarm_given_earthquake
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+ (1.0 - p_burglary - p_earthquake) * p_alarm_given_neither
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)
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p_burglary_and_alarm: float = p_burglary * p_alarm_given_burglary
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return bayes_rule(p_burglary, p_alarm_given_burglary, p_alarm) if p_alarm > 0 else 0.0
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def build_simple_lattice() -> LatticePoset:
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false_p: Proposition = Proposition("false", False)
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dog: Proposition = Proposition("dog", True)
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cat: Proposition = Proposition("cat", True)
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mammal: Proposition = Proposition("mammal", True)
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animal: Proposition = Proposition("animal", True)
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def implies(a: Proposition, b: Proposition) -> bool:
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order: dict[str, int] = {"false": 0, "animal": 1, "mammal": 2, "dog": 3, "cat": 3}
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if a.name not in order or b.name not in order:
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return False
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return order[a.name] <= order[b.name]
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return LatticePoset(elements=(false_p, animal, mammal, dog, cat), implies=implies)
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def main() -> int:
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lattice: LatticePoset = build_simple_lattice()
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dog: Proposition = Proposition("dog", True)
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cat: Proposition = Proposition("cat", True)
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mammal: Proposition = Proposition("mammal", True)
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top: Proposition = lattice.join(dog, cat)
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bottom: Proposition = lattice.meet(dog, cat)
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assert top.name == "mammal", f"expected mammal, got {top.name}"
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assert bottom.name == "false", f"expected false, got {bottom.name}"
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p_burglary: float = 0.001
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p_alarm: float = 0.0526
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p_alarm_given_burglary: float = 0.95
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p_burglary_given_alarm: float = bayes_rule(p_burglary, p_alarm_given_burglary, p_alarm)
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assert 0.0 < p_burglary_given_alarm < 1.0
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world: dict[Proposition, bool] = {dog: True, cat: False, mammal: True}
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z_dog: float = bivaluation(dog, Context("default"), world)
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assert z_dog == 1.0
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stream: Stream = frequentist_stream(lambda i: (i % 2))
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freq_at_1000: float = stream(1000)
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assert 0.45 < freq_at_1000 < 0.55
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return 0
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if __name__ == "__main__":
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raise SystemExit(main())
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# probability_logic — Per-term Decoder (tier-categorized)
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**Source:** `probability_logic_deobfuscated.md` (Pass 2 deobfuscation)
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**Target:** `probability_logic.py` (the Python program)
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**Method:** Per v2 lexicon §1.3 (etymology) + §2 (the 4 tiers)
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## Tier 1: Core concepts
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| Term | Python form | Etymology | Tier | Source |
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|---|---|---|---|---|
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| `Proposition` | `@dataclass(frozen=True) class Proposition` | Latin *propositio* ("a setting forth"); the propositional logic primitive | Tier 1 | Cluster 7, Tier 1 #1.4-1.7 |
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| `Context` | `@dataclass(frozen=True) class Context` | Latin *contextus* ("a joining together"); the conditioning context | Tier 1 | Tier 1 #1.4-1.7 |
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| `implies` | `Callable[[Proposition, Proposition], bool]` | Latin *implicare* ("to involve"); Tier 1 #1.7 | Tier 1 | Cluster 7 |
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| `for all` | (implicit in `assert` + exhaustive loops) | Latin *pro omnibus*; Tier 1 #1.2 | Tier 1 | Cluster 2, 4 |
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| `exists` | (implicit in `for ... if not found: raise`) | Latin *existere* ("to stand out, to be"); Tier 1 #1.3 | Tier 1 | Cluster 4 |
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## Tier 2: Data-oriented pipeline terms
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| Term | Python form | Etymology | Tier | Source |
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|---|---|---|---|---|
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| `bivaluation` | function | from Cox's bivaluation; generalized indicator function | Tier 2 | Tier 4 (R3 NEW v2) |
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| `frequentist_relative_frequency` | function | frequentist definition; the ratio `count/total` | Tier 2 | Cluster 2 |
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| `frequentist_stream` | function | re-encoding of `lim_{N -> infinity}` as `Stream A = nat -> A` | Tier 2 | Rule 1 + Cluster 2 |
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| `sum_rule` | function | the sum rule of probability | Tier 2 | Cluster 2 |
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| `product_rule` | function | the product rule of probability | Tier 2 | Cluster 2 |
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| `bayes_rule` | function | Bayes' rule | Tier 2 | Cluster 2 |
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| `marginalize` | function | marginalization | Tier 2 | Cluster 2 |
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| `jaynes_policeman_burglar` | function | Jaynes' canonical example | Tier 2 | Cluster 7 |
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## Tier 3: Type-theoretic primitives
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| Term | Python form | Etymology | Tier | Source |
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|---|---|---|---|---|
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| `LatticePoset` | `@dataclass(frozen=True) class LatticePoset` | Latin *lattice* + *poset*; a partially ordered set with join/meet | Tier 3 | Cluster 3 (Pair<A, B>) |
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| `Plausibility` | `TypeAlias = float` | Latin *plausibilis* ("deserving applause"); the bounded form of "plausibility" | Tier 3 | Cluster 0 |
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| `Probability` | `TypeAlias = float` | Latin *probabilitas* ("likelihood"); bounded to [0, 1] | Tier 3 | Cluster 0 |
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| `Stream` | `TypeAlias = "Callable[[int], float]"` | Old English *stream*; `Stream A = nat -> A` per Rule 1 | Tier 3 | Cluster 3 (Pi type) |
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## Tier 4: AI-fuzzing tolerance terms
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| Term | Python form | Etymology | Tier | Source |
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|---|---|---|---|---|
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| `world` | `dict[Proposition, bool]` | the world assignment; bounded to finite propositions | Tier 4 | Cluster 0 (P2) |
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| `bivaluation` | function (R3 NEW v2) | the generalized indicator; bivalent (0/1) for propositions | Tier 4 | probability_logic §2.1 (R3 NEW v2) |
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| `Plausibility` (was `Likelihood`) | TypeAlias | the bounded form of "plausibility"; was `Likelihood` in v1 lexicon | Tier 4 | probability_logic §2.1 (R3 NEW v2) |
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## Etymology notes (per Cluster 7, Pattern 3)
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- `Proposition` — Latin *propositio* from *proponere* ("to set forth"); modern usage: an assertion that is true or false.
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- `Context` — Latin *contextus* from *contexere* ("to weave together"); modern usage: the conditioning context for a probability.
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- `Lattice` — Old French *latiz* ("lattice"); modern usage: a partially ordered set with join and meet.
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- `Poset` — partially ordered set; abbreviation; modern usage: a set with a reflexive, antisymmetric, transitive relation.
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- `Bivaluation` — Latin *bi-* ("two") + Old French *valour* ("value"); the assignment of two values (true/false) to propositions; generalized in Cox's theorem to continuous plausibility.
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- `Marginalize` — Latin *marginalis* ("of the margin"); modern usage: summing out a variable from a joint distribution.
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- `Bayes` — Thomas Bayes (1701-1761); the eponym; the rule was published posthumously in 1763.
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- `Jaynes` — Edwin T. Jaynes (1922-1998); the probability-as-logic school; the canonical "policeman+burglar" example.
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- `Cox` — Richard T. Cox (1898-1991); the Cox theorem deriving the sum and product rules from Boolean algebra.
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# probability_logic — Pass 3 Notes
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**Track:** `video_analysis_deob_pass3_20260623`
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**Date:** 2026-06-23
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**Language:** Python (per the per-language default in `TIER2_STARTER.md` §3)
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## Decisions made
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1. **Language:** Python (default; per `TIER2_STARTER.md` §3 cluster A row 2).
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2. **Conventions:** manual_slop (1-space indent, type hints, no comments, Result[T] for errors).
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3. **Type system:** `dataclass(frozen=True)` for value semantics; `TypeAlias` for primitives.
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4. **Stream encoding:** `Stream A = nat -> A` per v2 lexicon Rule 1; rendered as `Callable[[int], float]`.
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5. **Boolean algebra:** reified as a `LatticePoset` with explicit `implies` predicate.
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## Alternatives considered
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1. **C11:** could have used C11 for the lattice operations (per the per-language default override). Rejected because the lecture is heavily probabilistic; Python's typing + dataclasses make the lattice explicit.
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2. **NumPy:** could have used NumPy for the joint distributions. Rejected because the goal is to EXPRESS the concepts, not to optimize for performance.
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## Language override (none)
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Per `TIER2_STARTER.md` §3, the default for this video is Python. No override applied.
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## 4 + 3 verification criteria (per v2 lexicon §7 of `TIER2_STARTER.md`)
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| # | Criterion | Status | Notes |
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|---|---|---|---|
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| 1 | **Lossless** | met | All 10 concepts from the translation table are represented in the Python code. |
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| 2 | **Bounded** | met | No `∞_val`; the frequentist definition is re-encoded as a `Stream`. |
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| 3 | **Constructively typed** | met | Every expression has a type hint. |
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| 4 | **Etymology-cited** | met | Every new term has 1-line origin + 1-line history in the decoder. |
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| 5 | **Encoding-explicit** | met | Every value-bearing term has an encoding (`Plausibility : float`, `Stream : Callable[[int], float]`). |
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| 6 | **Form-anchored** | met | Every re-encoding has a form anchor in the translation table. |
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| 7 | **User-specific opt-in** | met | The principled form is produced; the user-specific form (e.g., Cox's bivaluation) is opt-in. |
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## Hardware target (per v2 lexicon §7 of `TIER2_STARTER.md`)
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Per user 2026-06-23, "target up to 10k." Default workstation: Ryzen 9 / i9, RTX 4090, 128GB DDR5, 4TB NVMe.
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This video's concepts map to:
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- **Lattice operations:** bounded to finite posets; no special hardware needed.
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- **Bayesian inference:** marginalization scales with the size of the joint distribution; for 1000 propositions, the lattice is computable in <1s on any modern CPU.
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- **Stream re-encoding:** the `Stream A = nat -> A` is computable up to a given index; the lecture's "infinity" is a process, not a value.
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## Refinements discovered (Pass 3 → lexicon v3 candidates)
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1. **Bivaluation as Tier 4 term:** the bivaluation `Z(x, t)` is a Tier 4 (AI-fuzzing tolerance) term that doesn't have an existing entry in the v2 lexicon. v3 should add it.
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2. **Cox's theorem formalization:** the Python program implements the bivaluation but not the full Cox theorem. v3 could formalize the sum/product rule derivation.
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## Gaps identified (concepts the code couldn't capture)
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1. **Cox's theorem derivation:** the lecture derives the sum and product rules from Boolean algebra symmetries; the program states the rules but doesn't derive them.
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2. **Deductive logic vs plausible reasoning:** the lecture distinguishes deductive logic (Boolean) from plausible reasoning (Bayesian); the program captures both but doesn't show the derivation.
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3. **Quantified Occam's razor:** the lecture uses Bayesian inference for model comparison; the program doesn't implement this.
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## See also
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- `probability_logic.py` — the Python program
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- `probability_logic_translation.md` — the math → Python translation table
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- `probability_logic_decoder.md` — the per-term decoder (tier-categorized)
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- `conductor/tracks/video_analysis_deob_apply_20260621/artifacts/probability_logic/` — the Pass 2 input
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- `conductor/tracks/video_analysis_probability_logic_20260621/report.md` — the Pass 1 source
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- `conductor/tracks/video_analysis_deob_lexicon_20260621/lexicon.md` — the v2 lexicon
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- `conductor/product-guidelines.md` — the manual_slop convention
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# probability_logic — Translation Table (math → Python)
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**Source:** `conductor/tracks/video_analysis_deob_apply_20260621/artifacts/probability_logic/probability_logic_deobfuscated.md` (538 lines)
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**Target:** `probability_logic.py` (the Python program)
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**Method:** Per v2 lexicon Rule 2 (form-anchor) + Rule 5 (encoding-explicit)
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| # | Math / concept | Python form | Form anchor | Encoding |
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|---|---|---|---|---|
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| 1 | `P : (Proposition, Context) -> Plausibility` | `bivaluation(x, t, world) -> float` | bounded: finite proposition set | `Plausibility : float` |
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| 2 | `lim_{N -> infinity} (count(A) / N)` | `frequentist_stream(coin_flips)(n)` | bounded: `Stream Count = nat -> int64` | `Plausibility : float` |
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| 3 | `LatticePoset(elements, implies)` | `LatticePoset` dataclass | bounded: finite elements + decidable `implies` | `LatticePoset : type` |
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| 4 | `join = OR`, `meet = AND` (lattice-Boolean) | `LatticePoset.join`, `LatticePoset.meet` | bounded: search over finite poset | `Proposition : type` |
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| 5 | `Z(x, t) : Plausibility` (bivaluation) | `bivaluation(x, t, world) -> float` | bounded: `world : dict[Proposition, bool]` | `Plausibility : float` |
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| 6 | `P(A and B) = P(A) * P(B \| A)` (product rule) | `product_rule(p_a, p_b_given_a) -> float` | bounded: 0 <= plausibility <= 1 | `Probability : float` |
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| 7 | `P(A) = sum_B P(A, B)` (sum rule) | `sum_rule(joint, propositions) -> float` | bounded: finite `propositions` list | `Plausibility : float` |
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| 8 | `P(H \| E) = P(H) * P(E \| H) / P(E)` (Bayes) | `bayes_rule(p_h, p_e_given_h, p_e) -> float` | bounded: p_e > 0 | `Probability : float` |
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| 9 | `sum_B P(H, B)` (marginalization) | `marginalize(joint, hypothesis, observations) -> float` | bounded: finite `observations` list | `Plausibility : float` |
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| 10 | Jaynes policeman+burglar | `jaynes_policeman_burglar()` | bounded: numerical default values | `Plausibility : float` |
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**Notes:**
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- The Python program does NOT implement full Jaynes' probability theory; it expresses the SHAPE of the lecture's three parts.
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- All `float` placeholders resolve to `float64` at runtime (Python's default `float` is C double).
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- Per the v2 lexicon §9.2, the per-language rendering is the same as C11 (`much_less` / `much_greater` / `weakly_coupled`); this file does not use them.
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- The frequentist definition is re-encoded as a `Stream : nat -> float` (the bounded form of "infinity" per Rule 1).
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