Agreed - this is the usual response, and the one that works for me if I can't quite muster up the confidence to say "0% probability for infinite-torture JHWH (or variation)". I guess you can justify something like p=0 with a combination of: "you haven't defined what you mean by JHWH sufficiently for me to agree or disagree", "ok, you've told me enough that I see JHWH as a logical impossibility". Once a hypothetical god passes those bars, then you need recourse to all the possible god hypotheses. Priveleging the Hypothesis is a finite-scale version of the same objection.