CONTR_TAC : thm_tactic

SYNOPSIS
Solves any goal from contradictory theorem.

DESCRIBE
When applied to a contradictory theorem A' |- F, and a goal A ?- t, the tactic CONTR_TAC completely solves the goal. This is an invalid tactic unless A' is a subset of A.
    A ?- t
   ========  CONTR_TAC (A' |- F)

FAILURE
Fails unless the theorem is contradictory, i.e. has F as its conclusion.

SEEALSO  CHECK_ASSUME_TAC,   CONTR,   CCONTR,   CONTRAPOS,   NOT_ELIM

HOL  Kananaskis 0