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  2. Logic - Wikipedia

    en.wikipedia.org/wiki/Logic

    Logic studies valid forms of inference like modus ponens. Logic is the study of correct reasoning. It includes both formal and informal logic. Formal logic is the study of deductively valid inferences or logical truths. It examines how conclusions follow from premises based on the structure of arguments alone, independent of their topic and ...

  3. Bernays–Schönfinkel class - Wikipedia

    en.wikipedia.org/wiki/Bernays–Schönfinkel_class

    Ramsey proved that, if is a formula in the Bernays–Schönfinkel class with one free variable, then either {: ()} is finite, or {: ()} is finite. [ 1 ] This class of logic formulas is also sometimes referred as effectively propositional ( EPR ) since it can be effectively translated into propositional logic formulas by a process of grounding ...

  4. Logical consequence - Wikipedia

    en.wikipedia.org/wiki/Logical_consequence

    Logical consequence (also entailment or logical implication) is a fundamental concept in logic which describes the relationship between statements that hold true when one statement logically follows from one or more statements.

  5. Predicate (grammar) - Wikipedia

    en.wikipedia.org/wiki/Predicate_(grammar)

    This usage of the term comes from the concept of a predicate in logic. In logic, predicates are symbols which are interpreted as relations or functions over arguments. In semantics, the denotations of some linguistic expressions are analyzed along similar lines. Expressions which denote predicates in the semantic sense are sometimes themselves ...

  6. English grammar - Wikipedia

    en.wikipedia.org/wiki/English_grammar

    English determiners constitute a relatively small class of words. They include the articles the and a[n] ; certain demonstrative and interrogative words such as this , that , and which ; possessives such as my and whose (the role of determiner can also be played by noun possessive forms such as John's and the girl's ); various quantifying words ...

  7. Logical connective - Wikipedia

    en.wikipedia.org/wiki/Logical_connective

    In formal languages, truth functions are represented by unambiguous symbols.This allows logical statements to not be understood in an ambiguous way. These symbols are called logical connectives, logical operators, propositional operators, or, in classical logic, truth-functional connectives.

  8. Law of thought - Wikipedia

    en.wikipedia.org/wiki/Law_of_thought

    Beginning in the middle to late 1800s, these expressions have been used to denote propositions of Boolean algebra about classes: (ID) every class includes itself; (NC) every class is such that its intersection ("product") with its own complement is the null class; (EM) every class is such that its union ("sum") with its own complement is the ...

  9. Glossary of logic - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_logic

    This is a glossary of logic. ... [99] [100] [101] ... normal modal logic A class of modal logics that include the necessitation rule and the distribution axiom ...

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