The phrase "actually convinced that" is correct and usable in written English.
You can use it when expressing a strong belief or certainty about something, often in a context where doubt or skepticism may exist.
Example: "Despite the evidence presented, she was actually convinced that her theory was correct."
Alternatives: "truly convinced that" or "genuinely convinced that".
I'm actually convinced that what the world needs now is apps, not love.
But between getting merchants and others in the ecosystem on the same technology page, and consumers actually convinced that whipping out a phone is easier than presenting a card or cash, mobile payments have essentially remained a niche play.
I'm actually convinced that conservative pundits have such a large audience because their methods of stroking anger and insecurity play well to a growing segment of our population that is socially anxious and very lonely.
Stockman remains some kind of naive libertarian actually convinced that a free market ought to be free of control by the financial cartels and the cronies they purchase in government.
Wave at the person, looking really, really convinced that you actually know him or her.
Mr. Maccioni is the soul of charm and grace, but I'm not really convinced that he actually clears the plates at other tables, or runs over to personally fold a napkin when a guest stands up.
Reading the Awl and the Hairpin, and then working with the people that ran them, had actually convinced me that the Internet was silly, fun, generative, and honest.
I actually convinced myself that I was pretty darn amazing.
"I actually convinced myself that because they matched it was somehow an outfit," she says.
Given his own megalomania, Trump may have actually convinced himself that he is the smartest businessman around.
And I reached a point senior year, when my adjustment felt like me, I had actually convinced myself that I was this person and she, me, pretty, talented, but not stuck-up.
