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Mirrors > Home > LLPE Home > Th. List > cut1 | Structured version |
Description: Modus ponens like inference. |
Ref | Expression |
---|---|
cut1.1 | ⊦ 𝜑 |
cut1.2 | ⊦ (~ 𝜑 ⅋ 𝜓) |
Ref | Expression |
---|---|
cut1 | ⊦ 𝜓 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | cut1.1 | . . . 4 ⊦ 𝜑 | |
2 | 1 | ax-ibot 4 | . . 3 ⊦ (⊥ ⅋ 𝜑) |
3 | cut1.2 | . . 3 ⊦ (~ 𝜑 ⅋ 𝜓) | |
4 | 2, 3 | ax-cut 6 | . 2 ⊦ (⊥ ⅋ 𝜓) |
5 | 4 | ax-ebot 5 | 1 ⊦ 𝜓 |
Colors of variables: wff var nilad |
Syntax hints: ⊥wbot 1 ⅋ wmd 2 ~ wneg 3 |
This theorem was proved from axioms: ax-ibot 4 ax-ebot 5 ax-cut 6 |
This theorem is referenced by: mdcoi 12 mdasi 14 itopi 41 lb1d 57 lb2d 58 lbi1s 87 lbi2s 88 |
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