i go from oxford to cambridge to meet the director of the faraday institute for science and religion. he's a molecular biologist, a leader in cancer research, a scientist who believes in both god and evolution - dennis alexander. we meet in his lab. dennis, isn't agnosticism an honest recognition that i really don't know the best solution? >>well i actually think although intellectually, you know it sounds as if one could be an agnostic, i think that in reality, pragmatically, because we all have to construct our own biographies, we actually are committed to certain philosophies, actually - which actually either pragmatically say there is a god or there isn't a god. we have to behave as if we know the answer, even if intellectually we say that we don't. >i don't use the term agnostic in the sense of well i don't know, it doesn't matter. i would use it in its strongest possible meaning - saying i am deeply concerned, i deeply want to, to investigate both sides and really understand what, what works - not because i want a behavioral mechanism for my life, but i am really concerned becau