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Mirrors > Home > ILE Home > Th. List > falim | GIF version |
Description: The truth value ⊥ implies anything. Also called the principle of explosion, or "ex falso quodlibet". (Contributed by FL, 20-Mar-2011.) (Proof shortened by Anthony Hart, 1-Aug-2011.) |
Ref | Expression |
---|---|
falim | ⊢ (⊥ → 𝜑) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | fal 1291 | . 2 ⊢ ¬ ⊥ | |
2 | 1 | pm2.21i 607 | 1 ⊢ (⊥ → 𝜑) |
Colors of variables: wff set class |
Syntax hints: → wi 4 ⊥wfal 1289 |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 104 ax-ia2 105 ax-ia3 106 ax-in1 576 ax-in2 577 |
This theorem depends on definitions: df-bi 115 df-tru 1287 df-fal 1290 |
This theorem is referenced by: falimd 1299 falantru 1334 falimtru 1342 csbprc 3289 |
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