---

Step * of Lemma double-negation-hyp-elim

∀[P,Q:ℙ].  ((P ⇒ (¬Q)) ⇒ (¬¬P) ⇒ (¬Q))
BY
{ Auto }

---

Latex:

---

Latex:
\mforall{}[P,Q:\mBbbP{}].    ((P  {}\mRightarrow{}  (\mneg{}Q))  {}\mRightarrow{}  (\mneg{}\mneg{}P)  {}\mRightarrow{}  (\mneg{}Q))


By

---

Latex:
Auto

---

Home Index