Logic programming that computational steps cannot be logically deduced. However, in concurrent logic programming, any result of a terminating computation is a logical consequence of the program, and any partial result of a partial computation is a logical consequence of the program and the residual goal (process network). Consequently, the indeterminacy of computations implies that not all logical consequences of the program can be deduced. Concurrent constraint logic programming combines concurrent logic programming and constraint logic programming, using constraints to control concurrency. A clause can contain a guard, which is a set of constraints that may block the applicability of the clause.
Logical atomism Russell thought that a moral of the revolutionary work in mathematics was this: equally revolutionary work in philosophy could occur, if we only make logic the essence of philosophizing. This aspiration lies at the origin, and motivates and runs through, logical atomism. Russell referred to his atomistic doctrine as contrary to the tier "of the people who more or less follow Hegel" (PLA 178). The first principle of logical atomism is that the World contains "facts". The facts are complex structures consisting of objects ("particulars"). A fact may be that an object has a property or that it stands in