dest_exists : term -> term * term

SYNOPSIS
Breaks apart a existentially quantified term into quantified variable and body.

DESCRIBE
If M has the form ?x. t, then dest_exists M returns (x,t).

FAILURE
Fails if M is not a existential quantification.

SEEALSO  mk_exists,   is_exists,   strip_exists

HOL  Kananaskis 0