TRUTHP-REWRITE-PLAN-TAC : TACTIC

TRUTHP-REWRITE-PLAN-TAC is a tactic.
As defined for use ETREE-NAT: is a primitive tactic.
If the planned line corresponds to a rewrite node with justification
truthp, justifies the line by ad hoc Truthp,
and makes a new planned line with the rewritten wff.

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