Answer:
A theory should be supported by a substantial body of evidence
Explanation:
The knowledge that most people possess about the world can be described as "conventional wisdom, background knowledge, and personal experience".
Conventional wisdom is a conviction or set of convictions that is broadly acknowledged by common people, particularly one which might be unclear on close examination. Similarly most people base their knowledge on their personal experiences which they face in day to day life along with the background knowledge about things.
