Theorem intnanr 920

Description: Introduction of conjunct inside of a contradiction. (Contributed by NM, 3-Apr-1995.)

Hypothesis

Ref	Expression
intnan.1	⊢ ¬ 𝜑

Assertion

Ref	Expression
intnanr	⊢ ¬ (𝜑 ∧ 𝜓)

Proof of Theorem intnanr

Step	Hyp	Ref	Expression
1		intnan.1	. 2 ⊢ ¬ 𝜑
2		simpl 108	. 2 ⊢ ((𝜑 ∧ 𝜓) → 𝜑)
3	1, 2	mto 652	1 ⊢ ¬ (𝜑 ∧ 𝜓)

Syntax hints:  ¬ wn 3   ∧ wa 103

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-in1 604  ax-in2 605

This theorem is referenced by:  rab0  3437  co02  5117  frec0g  6365  djulclb  7020  xrltnr  9715  pnfnlt  9723  nltmnf  9724  0g0  12607  if0ab  13687