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  2. Argument from ignorance - Wikipedia

    en.wikipedia.org/wiki/Argument_from_ignorance

    John Locke (1632–1704), the likely originator of the term.. Argument from ignorance (Latin: argumentum ad ignorantiam), or appeal to ignorance, [a] is an informal fallacy where something is claimed to be true or false because of a lack of evidence to the contrary.

  3. Reverse psychology - Wikipedia

    en.wikipedia.org/wiki/Reverse_psychology

    Reverse psychology is a technique involving the assertion of a belief or behavior that is opposite to the one desired, ... and the results are often inconclusive ...

  4. False positives and false negatives - Wikipedia

    en.wikipedia.org/wiki/False_positives_and_false...

    The false positive rate (FPR) is the proportion of all negatives that still yield positive test outcomes, i.e., the conditional probability of a positive test result given an event that was not present.

  5. Rosy retrospection - Wikipedia

    en.wikipedia.org/wiki/Rosy_retrospection

    Note they were asked only about the preceding week: the 15-year-olds were not asked to recall their emotions at age 12. It found evidence of a ‘rosy’ positive bias for the 12-year-olds. But this was the opposite for the 15-year-olds, who showed a 'blue' negative bias instead. [12]

  6. Emotion classification - Wikipedia

    en.wikipedia.org/wiki/Emotion_classification

    Opposite emotions = four petals apart = Anticipation ∉ Surprise. There are also triads, emotions formed from 3 primary emotions, though Plutchik never describes in any detail what the triads might be. [58] This leads to a combination of 24 dyads and 32 triads, making 56 emotions at 1 intensity level. [59]

  7. Second partial derivative test - Wikipedia

    en.wikipedia.org/wiki/Second_partial_derivative_test

    If D(a, b) = 0 then the point (a, b) could be any of a minimum, maximum, or saddle point (that is, the test is inconclusive). Sometimes other equivalent versions of the test are used. In cases 1 and 2, the requirement that f xx f yy − f xy 2 is positive at (x, y) implies that f xx and f yy have the same sign there.

  8. Proof by contradiction - Wikipedia

    en.wikipedia.org/wiki/Proof_by_contradiction

    More broadly, proof by contradiction is any form of argument that establishes a statement by arriving at a contradiction, even when the initial assumption is not the negation of the statement to be proved. In this general sense, proof by contradiction is also known as indirect proof, proof by assuming the opposite, [2] and reductio ad ...

  9. Antiphrasis - Wikipedia

    en.wikipedia.org/wiki/Antiphrasis

    Antiphrasis is the rhetorical device of saying the opposite of what is actually meant in such a way that it is obvious what the true intention is. [1] Some authors treat and use antiphrasis just as irony, euphemism or litotes. [2] When the antiphrasal use is very common, the word can become an auto-antonym, [3] having opposite meanings ...