How I Met Your Mother Or Friends Quiz: Who Said It, Ted Mosby Or Ross Geller?

Ross Geller and Ted Mosby
NBC

10. "It's Like Descartes Says, 'In Order To Determine Whether We Can Know Anything With Certainty, We First Have To Doubt Everything We Know.'"

Ted Mosby

Ross Geller
Contributor

Kurt Howes hasn't written a bio just yet, but if they had... it would appear here.