X2118 : %THEOREM%X2118 is a theorem.
FORALL x(I) [p(O) AND Q(OI) x OR ~p AND R(OI) x] IMPLIES FORALL x Q x OR FORALL x R x
You may not use ADVICE, but all other rules and commands are allowed.
Only book theorems may be ASSERTed as lemmas without proof.
For a complete list of book theorems, type PROBLEMS.
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