dest_disj : term -> term * term

SYNOPSIS
Breaks apart a disjunction into the two disjuncts.

DESCRIPTION
dest_disj is a term destructor for disjunctions:
   dest_disj `t1 \/ t2`
returns (`t1`,`t2`).

FAILURE CONDITIONS
Fails with dest_disj if term is not a disjunction.

SEE ALSO
is_disj, mk_disj.