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A comment on The theory of relativity in words of four letters or less. Parent comment

Re:The theory of relativity in words of four letters or less by shardling on Friday May 17, 2013 @07:01PM (#5727113)
You can measure acceleration without needing a special frame. More significantly, you can measure rotational motion without something to measure against.

See that Feynman quote I linked in my original post; he discusses exactly this point.

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Re:The theory of relativity in words of four letters or less by breadbox on Friday May 17, 2013 @08:27PM (#5727408)
Which is exactly why that passage confined itself to talking about constant motion.
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Re:The theory of relativity in words of four letters or less by shardling on Friday May 17, 2013 @11:51PM (#5727863)
But the argument you used would seem to apply to both of those thing. That's what makes it flawed -- you claim it is obvious, when in fact this line of argument is very subtle and often misleads laymen. (Notice that in this very thread there seem to be people who think you couldn't detect acceleration.)
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