
According to the Concise Oxford Dictionary
"Both the one-word form cannot and the two-word form can not are acceptable, but cannot is far more common. Reserve the two-word form for constructions in which not is part of a set phrase, such as ‘not only … but (also)’: Paul can not only sing well, he also paints brilliantly. "
"can't" will also work here.
(In my own opinion, the ears of native English speakers are more attuned to the spoken language. If it sounds too literary, then it was probably written by a foreigner.)

Thank you, Dejo.
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This sentence was initially added as a translation of sentence #1044056
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