People without cognitive impairments tend to read with ease. People with cognitive impairments tend to have great difficulty reading. Ttherefore, if people with cognitive impairments are taught to read with ease, the proportion of people with cognitive impairments will decrease. A reasoning error in the argument is that the argument ['confuses the relationship between the cause of something and the resulting effect', 'takes the lack of evidence for the existence of a causative relationship to prove that a causative relationship does not exist', 'presupposes that which is to be proved', 'refutes a generalization by means of an exceptional case']