True, though it would be more accurate to replace "failed" with "didn't see any need". Why would that invalidate my criticisms? (A patient is feeling sick. Som

True, though it would be more accurate to replace "failed" with "didn't see any need". Why would that invalidate my criticisms? (A patient is feeling sick. Someone comes by and says "Recite a prayer over him, and paint his face green; that'll make him feel better". Do I need to have an alternative treatment in mind in order to say "You've given no reason to think that that will work. And if prayer is going to do any good, surely it matters just what sort of prayer to what deity." ?)