One big difference in favor of selection for intelligence relative to testing for Down syndrome is that at the point where people don’t get a Down syndrome test, they have a fairly low probability of their child having the disease (something like 1/1000 while they are youngish), whereas selection for intelligence is likely to increase intelligence.
An interesting datapoint, thanks.
One big difference in favor of selection for intelligence relative to testing for Down syndrome is that at the point where people don’t get a Down syndrome test, they have a fairly low probability of their child having the disease (something like 1/1000 while they are youngish), whereas selection for intelligence is likely to increase intelligence.