MODIFY_CONS : (thm -> thm) -> thm -> thm
STRUCTURE
Drule
SYNOPSIS
Strips universal quantifiers and antecedents of implications, modifies the conclusion, and replaces the antecedents
DESCRIPTION
If MODIFY_CONS g t gives t', then 
   |- !x. a1 ==> !y. a2 ==> !z. a3 ==> !u. t
   ----------------------------------------- MODIFY_CONS g
	   |- a1 ==> a2 ==> a3 ==> t'
EXAMPLE
 |- !s t. s SUBSET t ==> (s UNION (t DIFF s) = t) /\ ....
 -------------------------------------------------------- MODIFY_CONS CONJUNCT1
       |- s SUBSET t ==> (s UNION (t DIFF s) = t)
FAILURE
Fails if g fails when applied to the consequent
COMMENTS
Doesn’t replace the quantifiers, because it is just a special case of REORDER_ANTS_MOD
SEEALSO
REORDER_ANTS_MOD, SPEC_ALL, GEN_ALL, UNDISCH, DISCH
HOL  Kananaskis-13