- semantic turnstile
- martelo semântico
English-Portuguese philosophical dictionary. 2014.
semantic turnstile
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Double turnstile — Not to be confused with ㅑ. In logic, the symbol is called the double turnstile. It is closely related to the turnstile symbol, which has a single bar across the middle. It is often read as models or is a semantic consequence of . In TeX, the… … Wikipedia
Propositional calculus — In mathematical logic, a propositional calculus or logic (also called sentential calculus or sentential logic) is a formal system in which formulas of a formal language may be interpreted as representing propositions. A system of inference rules… … Wikipedia
Sequent calculus — In proof theory and mathematical logic, sequent calculus is a family of formal systems sharing a certain style of inference and certain formal properties. The first sequent calculi, systems LK and LJ, were introduced by Gerhard Gentzen in 1934 as … Wikipedia
Entailment — For other uses, see Entail (disambiguation). In logic, entailment is a relation between a set of sentences (e.g.,[1] meaningfully declarative sentences or truthbearers) and a sentence. Let Γ be a set of one or more sentences; let S1 be the… … Wikipedia
First-order logic — is a formal logical system used in mathematics, philosophy, linguistics, and computer science. It goes by many names, including: first order predicate calculus, the lower predicate calculus, quantification theory, and predicate logic (a less… … Wikipedia
Rule of inference — In logic, a rule of inference (also called a transformation rule) is a function from sets of formulae to formulae. The argument is called the premise set (or simply premises ) and the value the conclusion . They can also be viewed as relations… … Wikipedia
sports — /spawrts, spohrts/, adj. 1. of or pertaining to a sport or sports, esp. of the open air or athletic kind: a sports festival. 2. (of garments, equipment, etc.) suitable for use in open air sports, or for outdoor or informal use. [1910 15; SPORT +… … Universalium
