I'm searching for an adjective to describe someone who emphatically makes claims without sufficient knowledge or factual basis. Someone who essentially sounds like or plays the expert, without the expertise. Could be a noun as well maybe?
- EX: I can't help but question his statements, despite his (conclusive) bravado.
- EX: I can't help but question his statements, he is a (blank)
- EX: I can't help but question his statements, he is by reputation (inarguable).
I thought of these not sure...