In the context of special relativity,
-- I drew an analogy between space and time.
-- I drew an analogy between rulers and clocks.
-- I drew an analogy between projection onto Joe's X axis
and a projection onto Joe's time axis.
In the entire history of analogies, I can hardly think of an analogy
that is more appropriate, more useful, and/or more profound.
You have to take into account the (-+++) signature of the metric, but
other than that, what's the problem?
I'll put it to you as a question: If this analogy is false, is there
any analogy that is not false? I'm beginning to wonder whether "six"
is analogous to "half a dozen".
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