Point one:  If the desire to inflict pain in a sexual context is sufficiently a human universal that somebody on this plane of existence can spot the signs in Keltham before he knows them himself, the Keepers know about this already.  The probability of this need not be evaluated; it's a flat fact.

Point one:  If the desire to inflict pain in a sexual context is sufficiently a human universal and sufficiently common that somebody on this plane of existence can spot the signs in Keltham before he knows them himself, the Keepers know about this already.  The probability of this need not be evaluated; it's a flat fact.