"confidently stated" is a correct and usable phrase in written English.
It can be used to describe how someone expresses their thoughts or opinions in a strong and assured manner. Example: The politician confidently stated his plans for economic reform during his speech. In this sentence, "confidently stated" is used to convey how the politician delivered his message with conviction and confidence.
David Cameron has met his pledge to lead the greenest government ever, the prime minister confidently stated on Thursday.
A whole year ago I wrote a poem called Japanese Maple, which confidently stated that when the maple tree in my garden turned to flame in autumn, that would be the end of me.
There was a time when Indian software companies confidently stated that there were so many talented educated Indians available to them that they would be able to swiftly "move up the value chain".
First, she brought up some previous testimony of McKay from last year, in which he confidently stated: "Today's off-shore oil-drilling technology bears about as much resemblance to what was available in the 1960s as a rotary dial telephone does to an iPhone".
Having confidently stated last September that he "would be more suited to Inter or Real Madrid" than more agricultural clubs such as Blackeye Rovers or Bolton Wanderers, then shouted over the ensuing guffaws that it wouldn't be a problem to "take me into the higher reaches of [Big Cup]", Sam Allardyce was today confirmed as the new manager of... Championship side West Ham.
Prof. Yang confidently stated, "More detailed results about how the respirasome works will be demonstrated by our lab and we hope these results will be published soon".
"That's life!" Harriet confidently states her case.
The Met Office's Hadley Centre now confidently states that it "can identify any changed risk of such events".
It's not just celebrities either, pretty much anyone with a media platform can end up confidently stating something as fact which turns out to be anything but, like claiming that eating curry with rice and chips is a new idea, or condemning people for anthropomorphising a horse while anthropomorphising a horse (wrongly, as it happens).
But to cite a single metric while confidently stating you know how to do something as complex as education reform?
Which do you think is more attractive, a man who is polite, hides all his real opinions about everything, worries he will make her angry, and every action he says and sentence he speaks is designed to make her have a positive image of him, or a man who confidently states his opinion, and says what he wants to say because he wants to?
