What is a jigger of Asperger's? The context paragraph is:
Page was not a social animal—those who interacted with him often wondered if there were a jigger of Asperger’s in the mix—and he could unnerve people by simply not talking. But when he did speak, he often came out with ideas that bordered on the fantastic. As an undergraduate at the University of Michigan, he became obsessed with transportation and drew up plans to replace the school’s mundane bus network with an elaborate monorail system, providing a “futuristic” commute between the dorms and the classrooms.