EQUALITY-PLAN-TAC : TACTIC

EQUALITY-PLAN-TAC is a tactic.
As defined for use ETREE-NAT:
(ORELSE EXT=-PLAN-TAC LEIBNIZ=-PLAN-TAC)
If the planned line corresponds to rewrite node with justification
for a rewritten equality, justifies the line appropriately,
and makes a new planned line with the rewritten wff.

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