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 ) |