Empiricism /(?)/

Em·pir·i·cism

Empiricism

n.
  1. The method or practice of an empiric; pursuit of knowledge by observation and experiment.
  2. Specifically, a practice of medicine founded on mere experience, without the aid of science or a knowledge of principles; ignorant and unscientific practice; charlatanry; quackery.
  3. The philosophical theory which attributes the origin of all our knowledge to experience. (Metaph.)