The student was actually following a very practical Bible principle found at 1 John 4: 1 ​ — not to believe too quickly everything you hear, even when it appears to come from an authoritative source.
ד ’: 1 — לא למהר להאמין לכל דבר שאתה שומע גם אם נדמה כי אומרו הוא בר סמכא .‏