Theorem
pm2.82
Theorem *2.82 of [WhiteheadRussell] p. 108. (Contributed by NM, 3-Jan-2005.)
Conclusion
\( \vdash \varphi \vee \psi \vee \chi \rightarrow \varphi \vee \neg \chi \vee \theta \rightarrow \varphi \vee \psi \vee \theta \)
Proof
pm2.24
orim2d
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jao1i
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orim1d
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