from The American Heritage® Dictionary of the English Language, 5th Edition.

  • abbreviation Genetics parental generation
  • abbreviation parity
  • abbreviation parity conjugation
  • abbreviation pass
  • abbreviation pawn (chess)
  • abbreviation Bible Peter
  • abbreviation Physics pressure

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun The sixteenth letter of the English alphabet, called pee and written in the Latin script.
  • noun The ordinal number sixteenth, derived from this letter of the English alphabet, called pee and written in the Latin script.
  • noun park
  • noun phone
  • noun pager
  • noun passenger
  • noun chess Pawn.
  • noun slang A "pure" form of an illegal drug, especially heroin.
  • noun slang, New Zealand methamphetamine
  • proper noun computing theory The set of all problems that are solvable in polynomial time by a deterministic Turing machine
  • noun The sixteenth letter of the basic modern Latin alphabet.
  • noun chemistry symbol for phosphorus
  • noun metrology symbol for peta-
  • noun biochemistry IUPAC 1-letter abbreviation for proline
  • noun mathematics probability


from Wiktionary, Creative Commons Attribution/Share-Alike License



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  • Strictly speaking, If P then Q, ~P, therefore ~Q is invalid -- modus ponens is only valid if you affirm P; it's not if you deny it.

    Refutation in verse

  • Thus, the claim ˜John's statement that P is true™ can be treated as equivalent to (say) ˜P, as John's statement said™.

    Peter Frederick Strawson

  • P(seems True|True)*P(True)+P(seems True|Lie)*P(Lie)

    Detect Lie, Bryan Caplan | EconLog | Library of Economics and Liberty

  • Typically such sentences are conditional sentences such as ˜if P then Q™, though Boethius also treats ˜P or Q™ as hypothetical, apparently because he thinks that disjunction can be translated in terms of a conditional sentence.

    The Statue of a Writer

  • P (~P/S) EU (~S), assuming that studying's increase in the probability of passing compensates for the effort of studying.

    Causal Decision Theory

  • Others take it to be crucial for any modal interpretation that it also answer questions of the form: Given that a system possesses property P at time s, what is the probability that it will possess property P² at time

    Modal Interpretations of Quantum Mechanics

  • P (pr (A) = x) 0 where ˜P™ is the agent's subjective probability function, and ˜pr (A)™ is the assignment that the agent regards as expert.

    Interpretations of Probability

  • Necessarily P iff, according to the modal fiction, at all worlds, P*, where P* is the possible-worlds paraphrase of P.

    Modal Fictionalism

  • P iff according to PW, P*. where “PW” is the fiction of possible worlds, P is any proposition, and P* is its possible-worlds

    Modal Fictionalism

  • In that event, ˜Anything is P if and only if it is P²™ comes out true with respect to the actual world but not necessarily true.

    Rigid Designators


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