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Mirrors > Home > ILE Home > Th. List > sylbir | Unicode version |
Description: A mixed syllogism inference from a biconditional and an implication. (Contributed by NM, 5-Aug-1993.) |
Ref | Expression |
---|---|
sylbir.1 |
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sylbir.2 |
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Ref | Expression |
---|---|
sylbir |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | sylbir.1 |
. . 3
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2 | 1 | biimpri 133 |
. 2
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3 | sylbir.2 |
. 2
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4 | 2, 3 | syl 14 |
1
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