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test

Backward Chaining Goal
Syntax

test lisp-form

Arguments

lisp-form is a single lisp form.

Description

Succeeds if and only if the lisp-form returns a non- nil value. Any currently bound variables may be used in the lisp form.

Examples
(test (> ?c 10))
(test (not (and  (eq ?a ?b) (member ?b ?c))))

KnowledgeWorks and Prolog User Guide - 4 Apr 2005

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