[perl4ever]

Among people who would pretend to be a given well known person, surely more of them know that person's real name than something that would make a plausible pseudonym. Or in any case, more of them would choose it.

And if someone thinks a pseudonym is a particular famous person, they must have a reason, which is unlikely to be weaker than just assuming a normal name is accurate.

I'm not up to doing a Bayesian analysis right now, but I feel like one could show it makes more sense to doubt an unverified name.