Theorem dral2 2066

Description: Formula-building lemma for use with the Distinctor Reduction Theorem. Part of Theorem 9.4 of [Megill] p. 448 (p. 16 of preprint). (Contributed by NM, 27-Feb-2005.) Allow a shortening of dral1 2067. (Revised by Wolf Lammen, 4-Mar-2018.)

Hypothesis

Ref	Expression
dral1.1

Assertion

Ref	Expression
dral2

Proof of Theorem dral2

Step	Hyp	Ref	Expression
1		nfae 2056	. 2
2		dral1.1	. 2
3	1, 2	albid 1885	1

Syntax hints:  ->wi 4  <->wb 184  A.wal 1393

This theorem is referenced by:  dral1ALT  2068  sbal1  2204  sbal2  2205  drnfc1  2638  drnfc2  2639  axpownd  8999  wl-sbalnae  30012

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1618  ax-4 1631  ax-5 1704  ax-6 1747  ax-7 1790  ax-10 1837  ax-11 1842  ax-12 1854  ax-13 1999

This theorem depends on definitions:  df-bi 185  df-an 371  df-ex 1613  df-nf 1617