Mirror, Times and BBC, Who Thunk the Best Philosophy?

The BBC History site, In Our Time is running an on-line poll for the GREATEST (western) PHILOSOPHER OF ALL (recorded) TIME. The folks at Crooked Timber are right: it really is between "the Greeks" and my inclination is to vote for the teacher who said that you should be careful what you claim is certain instead of the student who ignored that advice and developed some really goofy theories.