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  2. Unity of opposites - Wikipedia

    en.wikipedia.org/wiki/Unity_of_opposites

    In his philosophy, Hegel ventured to describe quite a few cases of "unity of opposites", including the concepts of Finite and Infinite, Force and Matter, Identity and Difference, Positive and Negative, Form and Content, Chance and Necessity, Cause and effect, Freedom and Necessity, Subjectivity and Objectivity, Means and Ends, Subject and ...

  3. Occam's razor - Wikipedia

    en.wikipedia.org/wiki/Occam's_razor

    Suppose that B is the anti-Bayes procedure, which calculates what the Bayesian algorithm A based on Occam's razor will predict – and then predicts the exact opposite. Then there are just as many actual priors (including those different from the Occam's razor prior assumed by A) in which algorithm B outperforms A as priors in which the ...

  4. Necessity and sufficiency - Wikipedia

    en.wikipedia.org/wiki/Necessity_and_sufficiency

    In logic and mathematics, necessity and sufficiency are terms used to describe a conditional or implicational relationship between two statements. For example, in the conditional statement : "If P then Q ", Q is necessary for P , because the truth of Q is guaranteed by the truth of P .

  5. Contingency (philosophy) - Wikipedia

    en.wikipedia.org/wiki/Contingency_(philosophy)

    Contingency is one of three basic modes alongside necessity and possibility. In modal logic, a contingent statement stands in the modal realm between what is necessary and what is impossible, never crossing into the territory of either status. Contingent and necessary statements form the complete set of possible statements.

  6. Metaphysical necessity - Wikipedia

    en.wikipedia.org/wiki/Metaphysical_necessity

    Metaphysical necessity is contrasted with other types of necessity. For example, the philosophers of religion John Hick [2] and William L. Rowe [3] distinguished the following three: factual necessity (existential necessity): a factually necessary being is not causally dependent on any other being, while any other being is causally dependent on it.

  7. Philosophical razor - Wikipedia

    en.wikipedia.org/wiki/Philosophical_razor

    Abductive reasoning – Inference seeking the simplest and most likely explanation; Duck test – Classification based on observable evidence; Explanatory power – Ability of a theory to explain a subject

  8. Ananke - Wikipedia

    en.wikipedia.org/wiki/Ananke

    In ancient Greek religion, Ananke (/ ə ˈ n æ ŋ k iː /; Ancient Greek: Ἀνάγκη), from the common noun ἀνάγκη ("force, constraint, necessity"), is the Orphic personification of inevitability, compulsion, and necessity. She is customarily depicted as holding a spindle.

  9. Affirming the consequent - Wikipedia

    en.wikipedia.org/wiki/Affirming_the_consequent

    In propositional logic, affirming the consequent (also known as converse error, fallacy of the converse, or confusion of necessity and sufficiency) is a formal fallacy (or an invalid form of argument) that is committed when, in the context of an indicative conditional statement, it is stated that because the consequent is true, therefore the ...