He was one of the first investigators to test theories by experimentation, and he was not afraid to question accepted wisdom if the evidence did not back it up.
همچنین اگر شواهد آنچه پذیرفته شده بود را ثابت نمی‌کرد ،‏ از زیر سؤال بردن آن اِبایی نداشت .‏