be stubborn

See: persevere
References in classic literature ?
It is undoubtedly better to deceive him entirely, and since he will be stubborn he must be tricked.
So that is why I am going to be stubborn and predict a win.
"Evan will be the first to admit he can be stubborn," says Mandy Carter, a North Carolina activist and a cofounder of Southerners on New Ground, a multiracial, multi-issue gay advocacy group.
Someone has also to tell Wahid that he is not in a position to be stubborn when he is the one in power.