Term for someone who is open-minded enough to adopt an untenable theory (often some kind of crackpot conspiracy), yet close-minded enough to reject all criticism of that theory. The combination of echoing empty space and solid, impenetrable plastic makes rational communication impossible.
I tell you, this Illinois lottery result proves that Obama is the antichrist. You're wasting your time arguing with me, I have a plastic empty head.
Fogey/fogy /fougi/ sl. (early 18C+, orig. Scot) old-fashioned, stuck-in-the mud.
Person with old fashioned ideas which he is unwilling to change: Come to the disco and stop being such an old fogey!
You think me an old fogeyand an old tory, his thoughtful voice said. I saw three generations since O’Connel’s time. I remember the famine. Do you know that the orange lodges agitated for repeal of the union twenty years before O’Connel did or before the prelates of your communion denounced him as a demagogue? You fenians forget some things. (James Joyce, Ulysses. Penguin Books,1992. p. 38)