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# exactly

For precise language, you should say "If x is in exactly one of these sets ..." and so on.

Also in the case of x being a member of exactly two sets, I think the case x in A and B is different from the case where x is in A and C, so you should have both cases written down.

Parting words from the person who closed the correction:

**Status:**Accepted

Reference to the user who closed the correction.:

Reference to the article this correction is about:

Status of the article (was it accepted?):

1

Status of the article (is it closed?):

1

What kind of correction is this:

Error

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## Versions

(v1) by mathwizard 2008-03-18