So, I'd say that originally, philosophy came first. But, as others have pointed out, different philosophical traditions use psychology in different degrees and ways. — Apollodorus
Sometimes philosophy and psychology seem to go hand-in-hand. Maybe there isn't a "which came first"? — Don Wade
Psychologism is the view that all true knowledge comes from feelings of certainty rather than "objective" truths independent of subjectivity. — Zenny
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