Fri, 28 Feb 1997 15:52:16 +0100 paulson Slightly more robust proof
Fri, 28 Feb 1997 15:51:06 +0100 paulson dup_intr & dup_elim no longer call standard -- this
Fri, 28 Feb 1997 15:46:41 +0100 paulson rule_by_tactic no longer standardizes its result
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