However knowledgeable they may be, experts in any field may have conflicting ideas and shifting opinions. Take, for example, the ongoing debate in medical science on something as basic as causes of illness.
किसी भी क्षेत्र के एक्सपर्ट चाहे कितने ही ज्ञानी क्यों न हों, अकसर उनके विचार एक - दूसरे से मेल नहीं खाते और हमेशा बदलते रहते हैं ।