Text: For example, to answer a question about how programs to serve handicapped children are working, we might select the cases of preschool and elementary programs; we might further select within preschool programs, those for the hearing impaired and those for the orthopedically impaired.
Entailment: To see how programs are working we can look at empirical data.
Contradiction: To see how programs are working you can not look at empirical data.