Common sense and Science: a risky combination.Common sense is considered to be the basic qualification of a person. But for many of the laws of nature, it acts like a heavy baggage, making the learning process difficult. The talk tries to explain why common sense is not a reliable tool in the search for truth. Examples where common sense leads to wrong conclusions will also be discussed.Freethinkers meet 2017 Organized by Freethinkers facebook group & Kerala Freethinkers forum on april 22,23 at Vyloppilli Samskrithi Bhavan ,Thiruvananthapuram