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Further improvements in cnfify: reduce amount of self-recursion
in or_normalize, remove detection of duplicate subexpressions (since it'shighly unlikely to be worth the amount of time it takes), and introducea dnfify() entry point so that unintelligible backwards logic in UNIONprocessing can be eliminated. This is just an intermediate step ---next thing is to look at not forcing the qual into CNF form when it wouldbe better off in DNF form.1 parent4644fc8 commit2119cc0
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