All it takes is a brief tour of a library and a quick skim through almost any scientific textbook to discover that there are many theories: the theory of evolution, the big bang theory, the theory that Gudda Gudda may actually be looking at a solo career, and countless others. Queens up-and-comer Costell may not be a scientist, but his latest Booth feature, We Have a Theory (making its world premiere in the Booth!), is proof that he can still explore, make discoveries, and report his findings to all of his hungry fans. Over subdued, dreamlike production from Sean Ross, Costell grants us a quick look into his life with some deliberate, conversational rhymes. If his previous Booth feature Timeless didn’t have you convinced that he’s here to stay, Theory will not only pick up the slack, but also redirect you right back to Timeless so you can appreciate what you slept on the first time around. Be sure to keep an eye out for Costell’s forthcoming album ELO, set to drop later this year.