It's the British English term for "period", as in the punctuation mark.
I don't mean it to indicate closemindedness. I do mean it to indicate that there aren't a whole bunch of exceptions and clauses to come. Take it as a contrast to an article that spent a lot of time and words on an argument that was based on what I believe to be a very flawed assumption. IMO so flawed as to be intentionally deceitful.
It's a way to end a statement that you feel so strongly about that you're indicating to others no amount of arguing or talking with change your opinion on it. Your mind's made up and you believe in that statement so strongly that you believe it to be unequivocally universally true.
Announcing closed mindedness.... not something I would ever want to do but I can see how its helpful in letting people know not to waste their time. Is there a reverse of this? As in, I have an opinion but am open to hearing others and their rational
I think “announcing closed mindedness” is pretty reasonable when it’s something that’s just a fact. 2+2=4, full stop.