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Mirrors > Home > MPE Home > Th. List > mp2b | Structured version Visualization version GIF version |
Description: A double modus ponens inference. (Contributed by Mario Carneiro, 24-Jan-2013.) |
Ref | Expression |
---|---|
mp2b.1 | ⊢ 𝜑 |
mp2b.2 | ⊢ (𝜑 → 𝜓) |
mp2b.3 | ⊢ (𝜓 → 𝜒) |
Ref | Expression |
---|---|
mp2b | ⊢ 𝜒 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | mp2b.1 | . . 3 ⊢ 𝜑 | |
2 | mp2b.2 | . . 3 ⊢ (𝜑 → 𝜓) | |
3 | 1, 2 | ax-mp 5 | . 2 ⊢ 𝜓 |
4 | mp2b.3 | . 2 ⊢ (𝜓 → 𝜒) | |
5 | 3, 4 | ax-mp 5 | 1 ⊢ 𝜒 |
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