logic operands problem

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Hello everybody,

I am having trouble finding a logic for following problem:

Should be true if:
page = 1 OR page = 3, but it should also be true if page = 2 OR page = 3

The result should never contain 1 AND 2 in the same time.

This obviously does not work:
(page = 1 OR page = 3) OR (page = 2 OR page = 3)

This also does not work:
(page = 1 OR page = 3 AND page != 2) OR (page = 2 OR page = 3 AND page != 1)

Has somebody an idea how to solve this?

Thank you in advance for any help!

Merlin

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