The conversation between human and AI assistant.
Why is there a probability of 2/3 instead of 50% in the puzzle with fair coin and two-headed coin?
Okay, so how does that affect the probability?
Well, since the two-headed coin always lands heads up, the probability of getting a tail on a flip when that coin is used is 0. Therefore, the probability of getting a head is 1 whenever the two-headed coin is used.