Kalam

[Jehanne]

If the Universe is destined to expand forever, there is plenty of time for proton decay to occur.

Stuff is sliding over our observable horizon all the time.  Eventually every proton will be alone in it's own local universe.  Then it if decays into a couple of cosmic ray photons, big deal.

All this would mean is that Penrose's model is difficult, if not impossible, to test let alone falsify. In any case, the mathematics "is beautiful" unlike the syllogistic cludgery of the Kalam. We are, of course, free to suspend judgment.