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As noted in a recent blog entry, I have decided not to engage in discussions of posts like this any longer. My time is better spent on other things.

Don may be a very nice guy and a good person, so this is not personal. But his writings are far from persuasive.

Here's my question to other readers.

What do you find more credible:
Einstein's writings and the resulting theory, plus a century of supporting evidence
or
Hamilton's discussions with odd and poorly defined concepts like "secondary force" with no evidence--or even proposed experiments--to challenge well-established theory?

Until Don proposes a test for his ideas as persuasive as the observed bending of light was for general relativity, I don't see a point in engaging further.

I repeat, this is not personal. It's simply a decision based on the best use of my time at Science Blog.

Fred Bortz -- Science and technology books for young readers (www.fredbortz.com) and Science book reviews (www.scienceshelf.com)