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			That's how it was at the university where I was advising in the late seventies. What happened was that you had a bunch of dropouts throughout the week, especially when the pref invitations came because there weren't any rules about when you had to drop people you didn't want. Therefore, the big groups stayed big and the little ones folded or remained as the campus punching bags.
		 
		
		
		
		
		
		
		
		
	
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