Sir Robert Bryson Hall II (born January 22, 1990), known professionally as Logic, is an American rapper, singer, songwriter, record producer and author. Raised in Gaithersburg, Maryland, Logic developed an interest in music as a teenager, and ventured into a musical career in early 2009, releasing Logic: The Mixtape and a mixtape titled Young, Broke & Infamous in 2010. He then signed with Visionary Music Group, and subsequently released three additional mixtapes over three years.