logic and computer science, two-variable logic is the fragment of first-order logic where formulae can be written using only two different variables....

science. First-order logic uses quantified variables over non-logical objects, and allows the use of sentences that contain variables. Rather than propositions...

mathematical logic, a propositional variable (also called a sentence letter, sentential variable, or sentential letter) is an input variable (that can either...

propositional logic, where a tautology is defined as a propositional formula that is true under any possible Boolean valuation of its propositional variables. A...

mathematical logic and computer science, a variable may be said to be either free or bound. Some older books use the terms real variable and apparent variable for...

logic. Second-order logic is in turn extended by higher-order logic and type theory. First-order logic quantifies only variables that range over individuals...

In logic, a quantifier is an operator that specifies how many individuals in the domain of discourse satisfy an open formula. For instance, the universal...

Fuzzy logic is a form of many-valued logic in which the truth value of variables may be any real number between 0 and 1. It is employed to handle the concept...

can even wrap beyond the edge of the chart for variable minimization. This is because each logic variable corresponds to each vertical column and horizontal...

spaces, etc. In mathematical logic, a variable is either a symbol representing an unspecified constant of the theory, or a variable which is being quantified...

In logic and the philosophy of logic, specifically in deductive reasoning, a rule of inference, inference rule or transformation rule is a logical form...

All of these types of variables can be quantified. There are two kinds of interpretations commonly employed for higher-order logic. Full semantics require...

propositional logic, ψ is a substitution instance of φ if and only if ψ may be obtained from φ by substituting formulas for propositional variables in φ, replacing...

logic. It is also called (first-order) propositional logic, statement logic, sentential calculus, sentential logic, or sometimes zeroth-order logic....

In logic, temporal logic is any system of rules and symbolism for representing, and reasoning about, propositions qualified in terms of time (for example...

first-order logic. In those contexts, a formula is a string of symbols φ for which it makes sense to ask "is φ true?", once any free variables in φ have...

Combinatory logic is a notation to eliminate the need for quantified variables in mathematical logic. It was introduced by Moses Schönfinkel and Haskell...

Logic Complexity Navigator for examples). Many DLs are decidable fragments of first-order logic (FOL) and are usually fragments of two-variable logic...

contains logic symbols. Without proper rendering support, you may see question marks, boxes, or other symbols instead of logic symbols. In logic, a set...

mathematical logic, Boolean algebra is a branch of algebra. It differs from elementary algebra in two ways. First, the values of the variables are the truth...

represent the required logical function by a diagram representing the logic variables and value of the function. By manipulating or inspecting a diagram...

Constraint logic programming is a form of constraint programming, in which logic programming is extended to include concepts from constraint satisfaction...

Classical logic Computability logic Deontic logic Dependence logic Description logic Deviant logic Doxastic logic Epistemic logic First-order logic Formal...

are interesting in the context of logics such as two-variable logic with counting that restrict the number of variables in formulas. Also, generalized counting...

networks and Bayesian networks. Arguments in subjective logic are subjective opinions about state variables which can take values from a domain (aka state space)...

In logic, a metavariable (also metalinguistic variable or syntactical variable) is a symbol or symbol string which belongs to a metalanguage and stands...

In digital logic, an inverter or NOT gate is a logic gate which implements logical negation. It outputs a bit opposite of the bit that is put into it...

Look up Appendix:Glossary of logic in Wiktionary, the free dictionary. This is a glossary of logic. Logic is the study of the principles of valid reasoning...

theorem-proving technique for sentences in propositional logic and first-order logic. For propositional logic, systematically applying the resolution rule acts...

In logic, specifically in deductive reasoning, an argument is valid if and only if it takes a form that makes it impossible for the premises to be true...