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  2. Proof of impossibility - Wikipedia

    en.wikipedia.org/wiki/Proof_of_impossibility

    One of the widely used types of impossibility proof is proof by contradiction.In this type of proof, it is shown that if a proposition, such as a solution to a particular class of equations, is assumed to hold, then via deduction two mutually contradictory things can be shown to hold, such as a number being both even and odd or both negative and positive.

  3. Münchhausen trilemma - Wikipedia

    en.wikipedia.org/wiki/Münchhausen_trilemma

    Baron Munchausen pulls himself out of a mire by his own hair.. In epistemology, the Münchhausen trilemma is a thought experiment intended to demonstrate the theoretical impossibility of proving any truth, even in the fields of logic and mathematics, without appealing to accepted assumptions.

  4. Proving a negative - Wikipedia

    en.wikipedia.org/wiki/Proving_a_negative

    Proving a negative or negative proof may refer to: Proving a negative, in the philosophic burden of proof; Evidence of absence in general, such as evidence that there is no milk in a certain bowl; Modus tollens, a logical proof; Proof of impossibility, mathematics; Russell's teapot, an analogy: inability to disprove does not prove

  5. Abel–Ruffini theorem - Wikipedia

    en.wikipedia.org/wiki/Abel–Ruffini_theorem

    [8] [14] The Abel–Ruffini theorem is thus generally credited to Abel, who published a proof compressed into just six pages in 1824. [3] (Abel adopted a very terse style to save paper and money: the proof was printed at his own expense. [9]) A more elaborated version of the proof would be published in 1826. [4]

  6. Negative result - Wikipedia

    en.wikipedia.org/wiki/Negative_result

    Proof of impossibility, a proof that a particular problem cannot be solved; Null result, a result which shows no evidence of the intended effect; Null hypothesis, a hypothesis that there is no relationship between two measured phenomena

  7. No-go theorem - Wikipedia

    en.wikipedia.org/wiki/No-go_theorem

    In mathematics there is the concept of proof of impossibility referring to problems impossible to solve. The difference between this impossibility and that of the no-go theorems is that a proof of impossibility states a category of logical proposition that may never be true; a no-go theorem instead presents a sequence of events that may never occur.

  8. Category:Mathematical proofs - Wikipedia

    en.wikipedia.org/wiki/Category:Mathematical_proofs

    This category includes articles on basic topics related to mathematical proofs, including terminology and proof techniques.. Related categories: Pages which contain only proofs (of claims made in other articles) should be placed in the subcategory Category:Article proofs.

  9. Evidence of absence - Wikipedia

    en.wikipedia.org/wiki/Evidence_of_absence

    A negative claim may or may not exist as a counterpoint to a previous claim. A proof of impossibility or an evidence of absence argument are typical methods to fulfill the burden of proof for a negative claim. [13] [16] Philosopher Steven Hales argues that typically one can logically be as confident with the negation of an affirmation.