Philosophy is not physics. Nothing more true could be stated!
However, in order to do physics, certain philosophical assumptions must first be made and accepted as valid.
Science, as science, has/have only two subject matters which it considers; they are matter (and the various forms in which matter appears, such as energy) and motion (including the various changes which material objects undergo). However, to study matter and motion, the scientist must accept the existence of an objective reality. This acceptance of an objective reality is referred to as the philosophical assumption called objectivism. Of objectivism, the physics department at Southern Methodist University states on one of their websites, "There is an objective reality which is the same for everyone. There exist unchanging laws by which the universe works, and these laws can be discovered (not invented) through experimentation. This point of view is called objectivism. This is a matter of belief; we can’t prove it to you. But we can justify it. The rules above lead to progress. They put people on the Moon and robots on Mars and Titan; they predict solar eclipses centuries in advance; they cure diseases like smallpox and polio; they give you light at the flick of a switch and more computing power in your hand than in all of 12th century Europe.”
Another example of a (set of) philosophical assumption(s) physics (and science, in general) must assume to be true in order to proceed with scientific investigations is the scientific method used by a given science. That scientific method is, itself, neither matter nor motion, and therefore cannot be a subject upon which science speaks, as science.
Now, of course, the scientists named Bill and Neil might choose to make comments about the veracity of objectivism and make comments about the inadequacies or competencies of the methods they use. However, when they do so, they are no longer speaking as scientists, but as philosophers. When they speak as philosophers, which they have every right to do, at some point the dialogue must courteously address their competencies and credentials in regard to the philosophical areas which they address.
Edited by Otto Piechowski, 20 January 2018 - 06:39 PM.