It's bare assertion and has no factual or explanatory merit.

(ii) The alleged Fascist plot rests on bare assertion and all the evidence points in the other direction.

The robust liberal response is not going to put off by the bare assertion of the contrary.

Pelorat said, "If you box me in this way, there is no way of disproving your bare assertion.

(7) Thus there is here no fiction, but, [y] true and bare assertions.

Ipse dixit - A bare assertion, such as "Believe it because I said so."

A bare assertion denies that an issue is debatable.

If the judge had stopped with bare assertion, it would have had a good deal of effect; but he made the mistake of trying to prove his position.

If no arguments were given to prove this proposition, it would just be a bare assertion.

This is just a bare assertion.