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Re: zero-length vectors (was: displacement)

Regarding the part of John Denker's response to Peter Schoch's post where
he wrote:

-- Consider the analogy to the question "what is three miles north of the
north pole?" ... there are some questions that should be left unanswered.

It seems to me that a better geographic analogy involving the North Pole
is: "what is the longitude of the North Pole?"

David Bowman
David_Bowman@georgetowncollege.edu