'may or not' is a correct and usable phrase in written English.
It can be used when stating possibilities or uncertainties. For example, "It may be sunny tomorrow, or it may not."
That may or not be true, but Mr. Polanski himself recognizes that the stakes are high.
"This may or not be an entertaining hour and a half in the theatre.
"This may or not be my best work," one writes, on a final exam.
And since he may or not now be Me's immortal companion, there's plenty of scope for a return.
Trouble with following instructions may or not, depending on the cause, and even that can be hard to define.
The account may or not be true, delivered as it was by a frightened young man being held prisoner.
To Laing Pink Floyd's Syd Barrett may or not have been introduced by Peter Jenner, the band's manager.
Do and Don't List For Airline Travel Looking for the definitive guideline on what the Transportation Safety Administration says you may or not carry on board an airplane?
At the centre of Inherent Vice is a shadowy cabal called the Golden Fang, which may or not involve dope-smuggling, property development, private sanitoria and dentistry.
