There are good scientific questions that cannot be answered by a physics experiment. For instance a question such as Is Newton’s constant G a conventional unit or a constant of nature? cannot be tested with an experiment. Inherently so. By definition.
Then how come physicists measure G in experiments? Does the fact that physicists measure the value of G prove that G is a constant of nature?
We know that no experiment can prove that something is an absolute constant. An experiment can only test two statements.
Historical evidence shows that G is a defined unit, just like the Astronomical Unit.
- Can there be an experiment that tests G is/is not a conventional unit?
- Or can there be an experiment that tests G is/is not a constant of nature?
My answer is no. Physicists’ assumption that G is a constant of nature is a philosophical opinion. This is the reason why physics experiments measuring G are not experiments but circular measurements and scientific fraud.
