dest_disjboolSyntax.dest_disj : term -> term * term
Term destructor for disjunctions.
If M is a term having the form t1 \/ t2,
then dest_disj M returns (t1,t2).
Fails if M is not a disjunction.
boolSyntax.mk_disj, boolSyntax.is_disj, boolSyntax.strip_disj,
boolSyntax.list_mk_disj