empirical
em-pir-i-cal
adjective
Based on observation or experience rather than theory or pure logic.
"We need empirical evidence to support this claim."
Thesaurus
Synonyms: data-based, existential, falsifiable, observational, a posteriori, trial-and-error, verifiable, confirmable, semiempirical, experimental, experiential, empiric
Antonyms: theoretic, theoretical