Metamath Proof Explorer
Description: A conjunction with a negated conjunction. (Contributed by AV, 8-Mar-2022) (Proof shortened by Wolf Lammen, 1-Apr-2022)
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|
Ref |
Expression |
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Assertion |
annotanannot |
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Proof
Step |
Hyp |
Ref |
Expression |
1 |
|
ibar |
|
2 |
1
|
bicomd |
|
3 |
2
|
notbid |
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4 |
3
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pm5.32i |
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