David ran a study on himself and found out he used to be annoying. He used to cite studies all the time but now questions the validity of science. He no longer looks to studies to figure out how to live. He was living in a world of logic where something was missing...the experience of life. The guys go on to question the very idea behind science that there is an objective world to measure. Perhaps it is all subjective. Quantum physics seems to think so with its flashy parallel universes and all.