empirical
US /emˈpɪr.ɪ.kəl/
UK /emˈpɪr.ɪ.kəl/
1.
based on, concerned with, or verifiable by observation or experience rather than theory or pure logic
:
•
The study provided strong empirical evidence for the effectiveness of the new drug.
•
His conclusions were based on empirical data collected over many years.