[moreless]

Probably not. They already know the outcomes and don't seem to care.

However 71% seems like a very low number... Does that mean that in 7 out of 10 cases the system guesses correctly if the patient is smoker or not? That's not really impressive IMHO. What am I missing?

[VMG]

what is impressive is that humans cannot do it

[TeMPOraL]

They can get to 50% with a coin.