If as the libertines insist sex has no inherent meaning of its own regardless of what we might think, then it can mean “only” whatever we happen to think. Say with modernity that it were so. In the first place, then, a sexual act that had been at first understood by the participants as agreeable, and indeed urgently desired by all of them, might later be understood retrospectively by one or another as rape (or vice versa, for that matter); and no assessment of its sexual meaning at any time, by any one, could be rightly construed as in any sense true. But in the second, the inherent meaninglessness of the sexual act would entail the utter vacuity of the term “rape,” as denoting a peculiarly sexual crime. Rape would then be an empty category, and reduce to the more basic, asexual category of assault.
But assault is likewise vulnerable to a similar nominalist reduction to morally meaningless contact: not inherently problematic, but only subjectively so. I.e., not really problematic at all. It’s just atoms meaninglessly hurrying about, nothing more.
Under a nominalist epistemology, no juridical procedure then can ever arrive at a verdict that can be properly characterized as such – as, literally, a true speech (vere dictum). If there’s no truth about acts in the first place, such truths cannot be apprehended or spoken of, nor therefore may there be any justice done about them. But if justice be impossible, so is society. All that is then available to us from each other is war.
Not that there’s anything wrong with that!