 The foregoing problem cases are generally developed under the rubric of “false beliefs” or “the disjunction problem” in the following way and can be traced to Fodor (1984). No one is perfect, so a theory of content should be able to explicate what is going on when a person makes a mistake, such as mistaking a fox for a dog. The first thought is that this happens when a fox (at a distance or in poor lighting conditions) causes the occurrence of a token of “X” and, since “X” means dog, one has mistaken a fox for a dog. The problem with this first thought arises with the invocation of the idea that “X” means dog. Why say that “X” means dog, rather than dog or fox? On a causal account, we need some principled reason to say that the content of “X” is dog, hence that the token of “X” is falsely tokened by the fox, rather than the content of “X” is dog or fox, hence that the token of “X” is truly tokened by the fox. What basis is there for saying that “X” means dog, rather than dog or fox? Because there appears always to be this option of making the content of a term some disjunction of items, the problem has been called “the disjunction  problem”.[6]