DISCH : (term -> thm -> thm)

SYNOPSIS
Discharges an assumption.

DESCRIBE
       A |- t
--------------------  DISCH u
 A - {u} |- u ==> t

FAILURE
DISCH will fail if u is not boolean.

COMMENTS
The term u need not be a hypothesis. Discharging u will remove all identical and alpha-equivalent hypotheses.

SEEALSO  DISCH_ALL,   DISCH_TAC,   DISCH_THEN,   FILTER_DISCH_TAC,   FILTER_DISCH_THEN,   NEG_DISCH,   STRIP_TAC,   UNDISCH,   UNDISCH_ALL,   UNDISCH_TAC

HOL  Kananaskis 0