You might be stupid. A moron. An idiot. A fool. A babbling unintelligent chimp with the IQ of a sack of hammers. But if you are a good speller, then people will still think that you're smart. Along with nuclear physicists and brain surgeons, great writers are seen as being among the intellectual giants of the planet. This is partly because proper spelling involves the simultaneous use of memory, intelligence, and intense concentration, and partly because spelling is such a bitch to learn.