NEG-EQUAL-ELIM-TAC : TACTIC
NEG-EQUAL-ELIM-TAC
is a tactic.
As defined for use
ETREE-NAT
: is a primitive tactic.
If a support
line
is a negated equality and planned
line
is
falsehood
,
applies
eneg
. Similar to Pfenning's tactic 217.
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