This issue came up in a recent thread and I recall that it came up in another thread about a year ago. I think it deserves its own thread. If it already has one and you know of it, please direct me to it. Does acceptance of Einstein's theory entail rejection of Newton's? On page 98 of Thomas S. Kuhn's famous "The Structure of Scientific Revolutions" he writes: (Today means 1962, perhaps things have changed since then) Kuhn goes on to support his point of view against various objections. This takes up a good part of the next 4 pages of his book. While I read this a while back and remembered the part about Newton being wrong, I had forgotten the part about it being a minority view. I have agreed with Kuhn's point of view ever since I learned of SR some 30 years ago and long before I read Kuhn's book. I always take that stance in my converstations on the subject. I went back today to reread that part of the book and now I realize that I am in the lion's den and that most other posters here disagree with the idea. Perhaps I am attracted to the idea (that Newton is wrong) because I am not a physicist and do not calculate the numerical answers to physical problems on a day to day basis. Like Einstein, I am not interested in this or that phenomenon, but rather I wonder what the old one is thinking. (Einstein and I don't share much else in common, more's the pity for him). If you are interested, take a side and give a reason. If your reason is one of those handled by Kuhn, then I will paraphrase his argument against it. If it is not one handled by him, I will enjoy the chance to consider the implications of it.