⊭
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Translingual
Symbol
⊭
- not a logical consequence of.
Usage notes
⊭A→B, or equivalently A⊭B, means that B is not provable from A, that is, there are cases where A is true and B is false.
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⊭
⊭A→B, or equivalently A⊭B, means that B is not provable from A, that is, there are cases where A is true and B is false.