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List of paradoxes. Outline of public relations – Overview of and topical guide to public relations. Map–territory relation – Relationship between an object and a representation of that object (confusing map with territory, menu with meal) Mathematical fallacy – Certain type of mistaken proof.
1. In French-law-based systems, refers to the legal operation, activity, or fact embodied or memorialized by a legal instrument (as opposed to the instrument itself, known as an instrumentum); 2. In German-law-based systems, refers to a transactional act, the main sub-type of legal acts. See also actus iuridicus.
Direct proof. In mathematics and logic, a direct proof is a way of showing the truth or falsehood of a given statement by a straightforward combination of established facts, usually axioms, existing lemmas and theorems, without making any further assumptions. [1] In order to directly prove a conditional statement of the form "If p, then q ", it ...
Originally, fallibilism (from Medieval Latin: fallibilis, "liable to error") is the philosophical principle that propositions can be accepted even though they cannot be conclusively proven or justified, [1][2] or that neither knowledge nor belief is certain. [3] The term was coined in the late nineteenth century by the American philosopher ...
Falsifiability (or refutability) is a deductive standard of evaluation of scientific theories and hypotheses, introduced by the philosopher of science Karl Popper in his book The Logic of Scientific Discovery (1934). [ B ] A theory or hypothesis is falsifiable if it can be logically contradicted by an empirical test.
Root of the word aboriginal. ab ovo: from the egg: i.e., from the beginning or origin. Derived from the longer phrase in Horace's Satire 1.3: "ab ovo usque ad mala", meaning "from the egg to the apples", referring to how Ancient Roman meals would typically begin with an egg dish and end with fruit (cf. the English phrase soup to nuts).
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. (Equivalently, it is impossible to ...
Pyrrhonism. Circular reasoning (Latin: circulus in probando, "circle in proving"; [1] also known as circular logic) is a logical fallacy in which the reasoner begins with what they are trying to end with. [2] Circular reasoning is not a formal logical fallacy, but a pragmatic defect in an argument whereby the premises are just as much in need ...