"left unconvinced" is grammatically correct and commonly used in written English.
You can use it whenever you want to convey that someone was not convinced or persuaded by something. Example: Despite the strong arguments presented by the defense, the jury was left unconvinced of the defendant's innocence.
I am left unconvinced of the efficacy of the political statement I made.
When meeting their President, the Kandahari elders stressed they were left unconvinced by what transpired at Marjah.
Yet protesters have been left unconvinced by its promises and remain determined to intensify their fight for real democratic change.
Those most adversely affected by Lance Armstrong's now self-confessed decade of deceit, cheating and bullying have been left unconvinced by his confessional interview with Oprah Winfrey.
After the bookseller declared bankruptcy in February, many publishers pressed for a reorganization plan, but they were left unconvinced that executives had a workable way to revamp the company.
So, for all of those who are still left unconvinced, I offer a collection of evidence that will demonstrate not only that the Chinese gymnast in question was born in 1994 and underage, but that Chinese officials, over the last few weeks, have systematically tried to cover it all up.
His denials left many unconvinced.
It has used a combination of repression and pledges of reform that have left Mauritanians unconvinced and more frustrated.
He left Rome unconvinced by the council's teaching on infallibility, but unwilling to go into schism.
The Economist should avoid the shaman's role.IAN DE MELLOWWahroonga, AustraliaSIR Your conclusion that cricket is the paramount sport left me unconvinced ("Freaks under pressure", December 18th).
Yet years of looking at his paintings – searching for the reason he is seen as so much more radical than, say, Monet – have left me unconvinced.
