re: How many Aggies does it take to screw in a light bulb?

3 men on a plane sitting next to and talking to each other. after an hour, 1st man says to second...

'you're a Harvard man aren't you?'

'why yes...how could you tell?'

'your command and use of the English language is superb.' second man says to first...'you're a MIT man aren't you?'

'why yes, yes I am. how'd you know?'

'your knowledge of the maths and sciences always gives you guys away'

after a few minutes and not wanting to feel left out, the third guy pipes up says...'guess you can't tell where I graduated from?'

the first guy says....yes, yes we can. you're a ATM grad.'

'how'd you guess that?'

'we saw your class ring when you were picking your nose.'