empirical (adj) - relying on knowledge based on observation and experiment rather than theory [em-pir-i-kuhl]
BREAKDOWN: EM- (in) + PIR- (try, test) + -IC (discipline) + -AL (pertaining to)
empiricism is the belief that experience, especially of the senses, is the only source of true knowledge
“There is a rumor going around that I have found God. I think this is unlikely because I have enough difficulty finding my keys, and there is empirical evidence that they exist.” —Terry Pratchett