dogmatist

To the modern dogmatist, these positions seem sceptical and pernicious.

Nay, I am no cold-blooded theorist, no thick-hided dogmatist; nor am I a chastely simple young man mooning in virginal innocence.

He is often a dogmatist, but this fault is not peculiar to him, he shares it with the rest of mankind.

You have a perfect right to do so; but in that case you are the dogmatist.

And the last great dogmatist, Leibniz, was the one who practised this method of uncritical assumption to the utmost extent.