the X that can be Y is not the true X: Yet another instance of
hackerdom's peculiar attraction to mystical references -- a common
humorous way of making exclusive statements about a class of things.
The template is from the "Tao te Ching": "The Tao which can be
spoken of is not the true Tao." The implication is often that the X
is a mystery accessible only to the enlightened. See the
trampoline entry for an example, and compare has the X nature.
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