This Isn't Even A Bijection

Every mathematician just cringed collectively. This mapping between letters is the kind of chaotic relationship my grad students try to pass off as "valid functions" on their problem sets. The red lines connecting letters from "STRANGER DANGER" to "TRANSGENDER" create a many-to-many relationship that would make set theory professors weep into their coffee. In proper math, each input should map to exactly one output for a function, and for a bijection, it should be one-to-one AND onto. This disaster? It's like watching someone solve equations by throwing darts at a number line. Next time you want to make connections, please consult a discrete mathematics textbook first.