Anchor: A core group of kids do have a distinct attention abnormality, but Ritalin worked so well--it can reduce distractibility even in perfectly normal children--that now almost any difficult child is considered for the diagnosis and drug.
Entailed: Ritalin worked well to keep kids on task.
Contradiction: Ritalin didn't work at all.
Contradiction: Statistical sampling does reduce the need for effective internal control.
Contradiction: He wasn't holding anything back.
Contradiction: Walking ten miles a day did nothing!
Contradiction: Two men are together