Says the poster who didn't know the word "articulate" could apply to a written response. Duhhhhh.
It doesn’t. Properly used, it refers to speech. C/c your definition/source. This is fun. Oh, and one more thing... your assumption is wrong. The trite and unoriginal idea that “when someone responds with an insult ... they couldn’t articulate a coherent response to point made,” has no basis in fact. Rethink it. I’m trying to be kind.