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The logic of here and there (HT, also referred as Smetanov logic SmT or as Gödel G3 logic), introduced by Heyting in 1930 [21] as a model for studying intuitionistic logic, is a three-valued intermediate logic where the third truth value NF (not false) has the semantics of a proposition that can be intuitionistically proven to not be false ...
Three Horizons (or 3H) is a framework and method for futures studies and practice, created by Anthony Hodgson, Andrew Curry, Graham Leicester, Bill Sharpe, Andrew Lyon and Ioan Fazey. [1] It presents a picture of change in a given system as an interplay of three horizons. [ 1 ]
A variant of the 3-satisfiability problem is the one-in-three 3-SAT (also known variously as 1-in-3-SAT and exactly-1 3-SAT). Given a conjunctive normal form with three literals per clause, the problem is to determine whether there exists a truth assignment to the variables so that each clause has exactly one TRUE literal (and thus exactly two ...
Propositional logic deals with statements, which are defined as declarative sentences having truth value. [29] [1] Examples of statements might include: Wikipedia is a free online encyclopedia that anyone can edit. London is the capital of England. All Wikipedia editors speak at least three languages.
The three-term contingency (also known as the ABC contingency) is a psychological model describing operant conditioning in three terms consisting of a behavior, its consequence, and the environmental context, as applied in contingency management. The three-term contingency was first defined by B. F. Skinner in the early 1950s. [1]
The rational choice model, also called rational choice theory refers to a set of guidelines that help understand economic and social behaviour. [1] The theory originated in the eighteenth century and can be traced back to the political economist and philosopher Adam Smith . [ 2 ]
The notion of a three-schema model was first introduced in 1975 by the ANSI/X3/SPARC three level architecture, which determined three levels to model data. [1]The three-schema approach, or three-schema concept, in software engineering is an approach to building information systems and systems information management that originated in the 1970s.
For example, a fact about the initial state is formalized by making assertions about (which is not a state, but a situation). The following statements model that initially, the robot carries nothing, is at location (,), and there are no broken objects: