I always figured that semi-approval was the doctor's Dark Tragic Past speaking, and/or Sally's bright young NY thing with the unthinking prejudices of the time. Eg Sally and the new black cook, a scene that causes horripilations. 'And what do you think her name is? *Sally*! I suggested she change it,' she writes, not turning a hair. Webster bats her down there, so I figured the same would apply to Sally's casual dismissal of 'the feeble-minded.' Perhaps not, then?