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Mirrors > Home > ILE Home > Th. List > bitrdi | Unicode version |
Description: A syllogism inference from two biconditionals. (Contributed by NM, 5-Aug-1993.) |
Ref | Expression |
---|---|
bitrdi.1 |
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bitrdi.2 |
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Ref | Expression |
---|---|
bitrdi |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | bitrdi.1 |
. 2
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2 | bitrdi.2 |
. . 3
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3 | 2 | a1i 9 |
. 2
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4 | 1, 3 | bitrd 188 |
1
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