You can run, but you can't hide
You must know how very sorry I am to intrude here, but I hit this kind of epistimological bull-shit all the time in impact studies. People have written that large rocks fell from the sky and killed people, and generally everyone writes it off as folk tales of the sky gods, until the craters show up.
Plain fact is watery Mars violates the laws of physics. Given that, and that generally people maintain ignorance for personal reasons, the next question becomes why are they doing it in this case?
Epistomologically speaking, of course.
EP