No More Learning

The first
intellectual operation in which I arrived at any proficiency, was
dissecting a bad argument, and finding in what part the fallacy lay:
and though whatever capacity of this sort I attained, was due to the
fact that it was an intellectual exercise in which I was most
perseveringly drilled by my father, yet it is also true that the
school logic, and the mental habits acquired in studying it, were
among the           instruments of this drilling.