If data has a half life, opinions rule @arbesman

The first post on facts or opinions this was my agreement with Peter Drucker

However, Sam Arbesman (picture) from The Kauffman Foundation also points out that most facts change over time. There are few absolute truths. He introduced the notion of “mesofacts”, warning that “your reality is out of date” and that “whatever period we are born in we view as the state of affairs”. Facts (averages of facts) obey (mathematical) rules: half of scientific data changes in about two generations. Many of our decisions are based on outdated facts. “Are your facts up-to-date?”

If data has a half life, opinions rule…..