Description: An inference for bottom elimination. (Contributed by Giovanni Mascellani, 24-May-2019)
| Ref | Expression | ||
|---|---|---|---|
| Hypothesis | botel.1 | ⊢ ( 𝜑 → ⊥ ) | |
| Assertion | botel | ⊢ ( 𝜑 → 𝜓 ) | 
| Step | Hyp | Ref | Expression | 
|---|---|---|---|
| 1 | botel.1 | ⊢ ( 𝜑 → ⊥ ) | |
| 2 | falim | ⊢ ( ⊥ → 𝜓 ) | |
| 3 | 1 2 | syl | ⊢ ( 𝜑 → 𝜓 ) |