Sentence:  Therefore , the only conceivable alternatives are those represented , on the one hand , by the two <WSD>at</WSD> least apparently self-consistent but mutually exclusive positions of Buri and Barth and , on the other hand , by the third but really pseudo position ( analogous to a round square ) of Bultmann . 
Meaning of the word marked with <WSD> tags:  if nothing else (`leastwise' is informal and `leastways' is colloquial)