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| Mirrors > Home > MPE Home > Th. List > idd | Structured version Visualization version GIF version | ||
| Description: Principle of identity id 22 with antecedent. (Contributed by NM, 26-Nov-1995.) |
| Ref | Expression |
|---|---|
| idd | ⊢ (𝜑 → (𝜓 → 𝜓)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | id 22 | . 2 ⊢ (𝜓 → 𝜓) | |
| 2 | 1 | a1i 11 | 1 ⊢ (𝜑 → (𝜓 → 𝜓)) |
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