Coming back to these posts and Drayeye's and Robert Jameson's comments on my remark on probability, I challenge anyone who thinks that the probability of a universe coming into existence prior to this one is zero to explain exactly why.

Having been asking questions here and there about probability and learning
more, I am now clear that it is impossible to give any kind of figure for an unknown. So, prior to the universe coming into existence and, therefore, at this point the probability of this being 1, it isimpossible to say the probability before that was zero, since the answer must be unknown.
Susan