Chris Kaposy, in “When prenatal tests hint at abortion,’’ makes two logical errors. First, he uses different standards for children with Down syndrome and other children. He writes that “individuals with Down syndrome tend to have good, happy lives, and their families do just as well as families that don’t have kids with disabilities.’’ Down syndrome adults bag groceries at my local supermarket. Most families of means would not feel their grown non-Down-syndrome child had a “good life’’ and was “doing well’’ bagging groceries.

Second, Kaposy overlooks the fact that families with Down syndrome children are a self-selected sample, because they chose to have the baby. Citing only their feelings gives a biased result. What are the feelings, years later, of parents who chose not to have a Down syndrome baby?

Many people feel they made the right decision in choosing to have a Down syndrome baby. That doesn’t mean those who chose otherwise did not. Some terminate a pregnancy because they lack the financial and psychological resources to care for a special-needs child and don’t want to inflict on their child a substandard life dependent on public resources and the generosity of others, both of which could someday disappear.

Keith Borden

North Billerica