Go backward to Indirect Method for Conjunctions Go up to Top Go forward to Explicitly Defined Predicates |
Proposition: For proving with knowledge K the goal G0 \/ G1, it suffices to prove G1 with additional knowledge ~G0:
~~>
K G0 \/ G1
K union {~G0} G1
"We have to show G0 \/ G1. Assume ~G0. Then ...(proof of G1)."
Same techniques as for decomposition of implications.