| 1 | Billy, are you fucking retarded? | |
| 2 | This school is calculated for retarded children. | |
| 3 | It may be dumbing down a region of your brain. | |
| 4 | Most children with Down syndrome have mild-to-moderate mental retardation. | |
| 5 | China started special education for the mentally retarded children in 1979. |
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