The assumption is that you don’t know how he picks the door when there are two goats. It’s a reasonable assumption when the problem statement doesn’t say anythi

The assumption is that you don’t know how he picks the door when there are two goats. It’s a reasonable assumption when the problem statement doesn’t say anything about it. It could be random, it could be the highest, it could be the lowest, it could depend on the position of the stars. The point is that you don’t know so the answer cannot depend on it.