for one do not understand why you don't qualify for a college degree once you've collected enough snapple caps. for instance, a queen bee can lay 1,500 eggs a day. biology degree, pl [cheering and applause] >> stephen: welcome back, everybody. my guests tonight are underground hip-hop pioneers. i'll ask them to clarify if they're more hip-hop or rip-rap. please welcome black star. [cheering and applause] hey, good to see you. thanks so much. good to see you again. thanks for coming back. all right. talib, mos, good to see you again. you were here this summer. >> i gave you hat. you got the swag. >> stephen: i got swag and you gave me some swagger. we have never met before. many of my audience members may be looking at you and thinking, hey, that looks like mos def, but you are no longer mos def, correct? >> nope, i'in the using mos def as a professional name anymore. >> stephen: you are? >> yassin bay. >> stephen: why would you not be mos def anymore? he's a famous guy who sells records. why not do that? >> well, i... it's a non de plume similar to what mark twain was. >> stephen: one of