99.99890581% chance that cheaters were operating on Absolute?

[DrVanNostrin]

It's not fair to only analize 25 hands because you've observed him for more than 25 hands. It is much more likely than you claim that would have a streak of 25 hands where he played very well (FTOP terms) preflop since he's played more than 25 hands.

Also you're assuming that 90% is his true VPIP. 90% is a statistic in this case, not a parameter.

edit: you also should look at whether he was the SB or BB when he folded and how his VPIP differs in the SB vs. the BB.