Chayro, I think you are right, but an even more serious issue is why others would claim that they "know" there is no difference. At its root science is based on observation and seeking explanations, not based on our present understanding of the laws of physics, which are at root only partial.
After a career as a researching professor in of all things, political science, and publishing seven textbooks and research monographs, I have had many peer reviewed research publications and know that good data are the basis of making an case for a relationship, not saying stupid things like, "everyone knows," "it is common sense'" etc.
After a career as a researching professor in of all things, political science, and publishing seven textbooks and research monographs, I have had many peer reviewed research publications and know that good data are the basis of making an case for a relationship, not saying stupid things like, "everyone knows," "it is common sense'" etc.