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Given some knowledge `K` and a goal `G`.

- We try

. If we are successful, then`K`union {~`G`}F(alse) `G`holds. - We try

. If we are successful, then ~`K`union {`G`}F(alse) `G`holds.

*We will see some examples for special situations.*

Author: Wolfgang Schreiner

Last Modification: November 30, 1999