I could believe that my ‘O’ and ‘P’ keys have been swapped, and thus anticipate that pressing my ‘O’ key will result in a ‘P’ and vice versa. This belief is clearly meaningful—it means something—but it also happens to be false. It passes the making beliefs pay rent test—but that isn’t a test for whether or not something is true.
I could believe that my ‘O’ and ‘P’ keys have been swapped, and thus anticipate that pressing my ‘O’ key will result in a ‘P’ and vice versa. This belief is clearly meaningful—it means something—but it also happens to be false. It passes the making beliefs pay rent test—but that isn’t a test for whether or not something is true.