Theorem 2sp 2226

Description: A double specialization (see sp 2223). Another double specialization, closer to PM*11.1, is 2stdpc4 2109. (Contributed by BJ, 15-Sep-2018.)

Assertion

Ref	Expression
2sp	⊢ (∀𝑥∀𝑦𝜑 → 𝜑)

Proof of Theorem 2sp

Step	Hyp	Ref	Expression
1		sp 2223	. 2 ⊢ (∀𝑦𝜑 → 𝜑)
2	1	sps 2225	1 ⊢ (∀𝑥∀𝑦𝜑 → 𝜑)

This proof depends on syntax axioms:   → wi 4  ∀wal 1568

This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1828  ax-4 1842  ax-5 1945  ax-6 2002  ax-7 2043  ax-12 2216

This proof depends on definitions:  df-bi 210  df-ex 1813

This theorem is used by:  cbv1h  2437  csbie2t  3889  copsex2t  5471  fprlem1  8356  frrlem15  9798  fundmpss  36747  bj-cbv1hv  37923  ax11-pm  37959  mbfresfi  38852  cotrintab  44875  pm14.123b  45670  ich2exprop  48826  ichnreuop  48827  ichreuopeq  48828