The Half-life of Facts: Why Everything We Know Has an Expiration Date

The Half-life of Facts: Why Everything We Know Has an Expiration Date by Samuel Arbesman

Most people stick with the things they learned when they were young. However, facts decay and become irrelevant after time. Each type of "fact" has a different half-life. Scientific facts change as we learn more. A doctor that only stuck with what they learned in medical school would likely be treating people in very outdated ways. (People were once treated with "bleeding". Cigarettes were once considered  healthy.) Continuing education is needed to stay current. It is impossible to know everything. Why waste brain space with outdated facts? It takes effort to keep our general knowledge up to date with current facts.