In the gravity example, you have a clear way to make a prediction and test it. The concept of gravity can clearly map via perception to reality, and thus the tr

In the gravity example, you have a clear way to make a prediction and test it. The concept of gravity can clearly map via perception to reality, and thus the truth. Most of the questions in this article given as examples of massive disagreements however are not like this. They hinge on interpreting the definitions of concepts we have invented that do not map so clearly to reality. The debate is often entirely over the definitions of the concepts themselves, not over reality or truth. It is more about language than physics.