I really do not understand why most people have such a big need to answer questions with yes or no instead of leaving them open.
Of course it is sometimes necessary to make a yes or no decission, even if we can`t be sure, but in many cases it is not, and it is much better to work with a floating likelyhood in the range of "for sure yes" through "maybe" to "for sure no".
I truely disgust when someone obviously does not know, then chooses a position, and then declares those who do not choose this position as wrong.