Those who have the ability to fully concentrate are always of above-average intelligence. Also, being successfully trained in speed-reading will usually be accompanied by an increased ability to concentrate. If the statements above are true, then each of the following could be true EXCEPT: ['All people who can speed-read are able to concentrate to some extent.', 'Some people can speed-read, and are able to fully concentrate, but are of below-average intelligence.', 'All people who can speed-read are of above average intelligence.', 'Many people of above-average intelligence are unable to fully concentrate.']