11 lines
201 B
Text
11 lines
201 B
Text
variables p q : Prop
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check ¬(p → q)
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check ¬p → q
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check (¬p) → q
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check ¬(p → q)
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check p ↔ q
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check ¬(p ↔ q)
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check ¬p ↔ q
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check (¬p) ↔ q
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check (p → q) ↔ q
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check p → (q ↔ q)
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