26 Jun '05 16:58>2 edits
the more i think about this, the more i am sure that the logical unnecessity of U entails the existence of R', and the proof can be found in bbarr's above post.
in particular, assume no such R' exists. then there are no logically possible states of affairs without U as a constituent that are morally preferrable to S. it follows that U is logically necessary for the bringing about of greater good. this directly contradicts premise 2'. thus the theist's committing to 2' also entails his committing to the existence of R'.
my take on it is then that your premise (6.1), although correct, is redundant and unnecessary for bbarr's formulation, ie, premise 6.1 cannot be rejected unless the theist has already rejected premise 2'.
in particular, assume no such R' exists. then there are no logically possible states of affairs without U as a constituent that are morally preferrable to S. it follows that U is logically necessary for the bringing about of greater good. this directly contradicts premise 2'. thus the theist's committing to 2' also entails his committing to the existence of R'.
my take on it is then that your premise (6.1), although correct, is redundant and unnecessary for bbarr's formulation, ie, premise 6.1 cannot be rejected unless the theist has already rejected premise 2'.