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Mirrors > Home > ILE Home > Th. List > ax-ia2 | GIF version |
Description: Right 'and' elimination. One of the axioms of propositional logic. (Contributed by Mario Carneiro, 31-Jan-2015.) Use its alias simpr 109 instead for naming consistency with set.mm. (New usage is discouraged.) |
Ref | Expression |
---|---|
ax-ia2 | ⊢ ((𝜑 ∧ 𝜓) → 𝜓) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | wph | . . 3 wff 𝜑 | |
2 | wps | . . 3 wff 𝜓 | |
3 | 1, 2 | wa 103 | . 2 wff (𝜑 ∧ 𝜓) |
4 | 3, 2 | wi 4 | 1 wff ((𝜑 ∧ 𝜓) → 𝜓) |
Colors of variables: wff set class |
This axiom is referenced by: simpr 109 |
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