(In your question, you should use the word "correct:" not "true." "Is my sentence correct grammatically?") I think it is correct, but I won't be sure until I can see the rest of the sentence. I can't actually think of a way to complete that sentence that makes logical sense to me! Here is an example of a similar pattern that is grammatically correct. "Politician X has no possibility of winning the election, even if he has raised more money than any of his opponents."