Fallout New Vegas Low Intelligence Easter Egg

[G-Haven]

Pretty much.

http://fallout.wikia.com/wiki/Vagrant

I Could Make You Care: When the Courier needs to ask around Freeside about a rangefinder, dialogue with him is possible. The Courier can pay him for the information, threaten him (Strength 7 needed) or if they have low Intelligence there is special dialogue line which makes him talk like an intellectual person (similar to Torr from Fallout 2).

That's only for the quest itself. Otherwise, "If the Courier tries to talk to him, he'll just laugh and cough."