Some neofascists like eugenicist talking points?
You lost me at "incorrigible" and honestly just mentioning phrenology will get every non-moron to just dismiss any argument.
Do you believe that my argument is on a slippery slope towards eugenicist nonsense? I disagree on that and would argue the reverse; children are too valuable to immediately "discard" (by exclusion from education) because of delinquency.