Scientific reason is that this notion from neuroscience of critical periods — that if the brain is older than four or five years of age, it loses its ability to learn — that doesn't sit well with me, because I don't think that idea has been tested adequately.
El motivo científico es la idea de la neurología sobre el periodo crítico en el que, si el cerebro tiene más de cuatro o cinco años, pierde la capacidad de aprender. Eso no lo acabo de digerir, porque no creo que esa cuestión se haya comprobado adecuadamente.