recycled paper cups

Can you compost paper cups?  The answer is yes, no and depends. In the same spirit as my last post on composting waxed paper, I emailed a bunch of companies that produce paper cups and asked them if their cups contained a plastic liner, and if so, what kind was used. With the exception of Solo and Chinet, all the other companies got back to me (although Dart and Solo appear to be part of the same conglomerate, and Dart replied).  I couldn't tell if the customer service people were weirded out by my questions...am I the only person asking this?  Probably close to it, but hopefully not the only one. My research into Solo was definitely the most peculiar.  I had no idea there was a (terrible) song dedicated…