Perhaps you remember last year when American football player Manti Te’o was catfished. An acquaintance of Te’o pretended to be a girl named Lennay Kekua, and Te’o became convinced that he was in an online long-distance relationship with this individual. When Kekua “died of cancer”, Te’o was devastated, and his devastation grew larger still when he discovered that the entire relationship was a lie, that Kekua was not a real person at all. Catfishing happens when the perpetrator manipulates over the course of an extended period of time a victim’s sense of reality to make the victim believe he is in a relationship with a non-existent person. It is a form of gaslighting, a devious strategy by which perpetrators systematically undermine victims’ notions of reality by systematically manipulating them into mistrusting their own senses and experience. My claim today is that there are philosophers who are engaged in gaslighting on a grand scale–those who believe that truth is a social construct.