I should probably have given as background that I don't believe that anyone is more or less intelligent than anyone else, including people with severe learning disabilities, so in a sense I think that the overall idea of 'intelligence' is nonsense. However, there are certain ways in which people create the impression of being 'intelligent', and my post was mainly aimed at explaining how that illusion arises in Johnson's case.
I should probably have given as background that I don't believe that anyone is more or less intelligent than anyone else, including people with severe learning disabilities, so in a sense I think that the overall idea of 'intelligence' is nonsense. However, there are certain ways in which people create the impression of being 'intelligent', and my post was mainly aimed at explaining how that illusion arises in Johnson's case.