In the human mind, everything is a theory. And, there are two kinds of theories. True theories and false theories. So, as a thinker, how do you tell the difference between true theories and false theories?
Evidence. The balance of evidence.
Theories that are supported by the balance of evidence we call ‘true’. Theories that are not supported by the balance of evidence we call ‘false’.
In those cases where new research provides a shift in the balance of evidence away from one side and toward the other then the theory may shift from ‘true’ to ‘false’ or vice versa. For example, flat earth theories have shifted from true to false. Heliocentric theories have shifted from false to true. In cases like these, as a thinker, you may find a need to change your mind.
An example of a true theory supported by the balance of evidence is the Big Bang Theory which is increasingly supported by more and more evidence every year. An example of a false theory is the Theory of the Assumption of Mary which is is supported by less and less evidence every year.
When did you last change your mind based on the balance of evidence?