When Patton was 12 years old, he could not read. He remained deficient at reading all his life. He could, however, memorise whole lectures, a method that he would use to complete school. He went on to become one of the most successful allied commanders of World War II.
Source: Graham,J., Shinkfield, A., Smith, K. & Polzin, U., 'Employer benefits and costs of employing a person with a disability', Journal of Vocational Rehabilitation, vol. 17, pp. 251-263.