I call that a skill issue, imagine not being able to read the subway map of new york , couldn't be me , fun fact : some scholars in Oxford in the U.K. set out to determine the maximium transit map information someone can “reasonably process.” and at what point that would “exceed our cognitive limits.” When it comes to information processing, an average person’s “cognitive threshold” is about 250 connections, or the equivalent of roughly eight bits of data New York’s system neared that limit, with 161 total connections, and the most complicated two-transfer trip a person could make on the subway exceeded it, clocking in at 8.1 bits.