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Mirrors > Home > MPE Home > Th. List > orc | Structured version Visualization version Unicode version |
Description: Introduction of a disjunct. Theorem *2.2 of [WhiteheadRussell] p. 104. (Contributed by NM, 30-Aug-1993.) |
Ref | Expression |
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orc |
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Step | Hyp | Ref | Expression |
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1 | pm2.24 112 |
. 2
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2 | 1 | orrd 385 |
1
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