plausiblometer

A plausiblometer is a hypothetical tool used to measure the likely hood of an event given a set of premises.

It may also be used more directly to find the most likely event to explain a set of premises.

My gf didn't come home after a night out the other day, she didn't answer her phone and refused to tell me where she was when we made contact, my plausiblometer is telling me she was most likely cheating.