dest_exists1 : term -> term * term

SYNOPSIS
Breaks apart a unique existence term into quantified variable and body.

DESCRIBE
If M has the form ?!x. t, then dest_exists1 M returns (x,t).

FAILURE
Fails if M is not a unique existence term.

SEEALSO  mk_exists1,   is_exists1

HOL  Kananaskis 0