Possible Duplicates:
Why is “cannot” spelled as one word?
Is “can not” unambiguous?

Is "Can not" a valid usage in English (American English if it differs), or I can not use that and must use "cannot"/"Can't"?

marked as duplicate by Mitch, Cerberus, Marthaª, RegDwigнt May 20 '11 at 21:30

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