Theorem dcan 946

Description: A conjunction of two decidable propositions is decidable. (Contributed by Jim Kingdon, 12-Apr-2018.)

Assertion

Ref	Expression
dcan	|- ( (DECID ph /\ DECID ps ) -> DECID ( ph /\ ps ) )

Proof of Theorem dcan

Step	Hyp	Ref	Expression
1		simpl 109	. 2 |- ( (DECID ph /\ DECID ps ) -> DECID ph )
2		simpr 110	. 2 |- ( (DECID ph /\ DECID ps ) -> DECID ps )
3	1, 2	dcand 945	1 |- ( (DECID ph /\ DECID ps ) -> DECID ( ph /\ ps ) )

Syntax hints:   -> wi 4   /\ wa 104  DECID wdc 846

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-in1 623  ax-in2 624  ax-io 721

This theorem depends on definitions:  df-bi 117  df-dc 847

This theorem is referenced by:  dcan2  947  dcbi  949  annimdc  950  pm4.55dc  951  orandc  952  anordc  969  xordidc  1448  gcdmndc  12710