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Computing (FOLDOC) dictionary
logic variable
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programming A variable in a logic programming language
which is initially undefined ("unbound") but may get bound to
a value or another logic variable during unification of the
containing clause with the current goal. The value to which
it is bound may contain other variables which may themselves
be bound or unbound.
For example, when unifying the clause
sad(X) :- computer(X, ibmpc).