The argument he was replying to was not about probability, but about pettiness. People could not accept that Christianity contains certain ideas that are petty in contrast to the scope of the universe. He then asked if a smaller universe would make them think Christianity is less petty. To which my reply would be that since Christianity was being compared to rival religions, any rivals would become less petty by a similar factor, so Christianity would still not improve comparatively.
The argument he was replying to was not about probability, but about pettiness. People could not accept that Christianity contains certain ideas that are petty in contrast to the scope of the universe. He then asked if a smaller universe would make them think Christianity is less petty. To which my reply would be that since Christianity was being compared to rival religions, any rivals would become less petty by a similar factor, so Christianity would still not improve comparatively.