The phrase 'non of' is not correct.
The correct phrase to use is 'none of'. Example: None of us had ever seen a creature like that before.
The sine qua non of subsequent contentment is, unsurprisingly, financial security, as he suggests.
Price is just not the sine qua non of Internet retailing.
And, of course, she is that sine qua non of political housewifery, an impeccable hostess.
Freedom is the sine qua non of a Doctor Brown gig.
"To run the M.T.A. is the sine qua non of transit jobs," Mr. Paaswell said.
The sine qua non of the limited-overs format, meanwhile, is the close finish.
Isn't being able to judge wine the sine qua non of a thoroughly modern sophisticate?
She was born in Bologna, the sine qua non of Italian culinary excellence.
But there was no mention was made of what I consider the sine qua non of hotel selection: quiet.
However, in the not-so-distant past, a sense of personal worth was a sine qua non of successful motherhood.
He gives directions for buttering and warming hard white common crackers, the sine qua non of chowder companions.
