Both cannot and can not are perfectly fine, but cannot is far more common and is therefore recommended, especially in any kind of formal writing. Can't has the same meaning, but as with contractions in general, it is somewhat informal.

Is Cannot one word or two?

Is cannot one word or two words? The answer is one word – most of the time. Cannot and can't have the same meaning, but can not appears differently in a sentence. Read on to find examples of situations in which cannot or can't would be acceptable, and when can not might cross your path.

What does CAN NOT MEAN?

: can not. cannot but or cannot help but or less commonly cannot help. : to be unable to do otherwise than we cannot but wonder why I cannot help feeling sorry for them.