NL888 most people agree that it is morally permissible, if not obligatory , for Denise to throw the switch and save the five by killing the one. if not obligatory ~ perhaps even required ~ (not only permissible, but more than that,) maybe even required X, if not Y, where Y is a more extreme form of X, is a fairly common idiom where the words "if not" cannot always be taken literally. quite well-off, if not rich (maybe even rich) dying, if not already dead (maybe even already dead) a highly intelligent man, if not a genius (maybe even a genius) CJ
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NL888most people agree that it is morally permissible, if not obligatory, for Denise to throw the switch and save the five by killing the one.if not obligatory ~ perhaps even required