Cartesian skepticism and egoism, when I was maybe eleven. I eventually managed to argue myself out of both—Cartesian skepticism fell immediately, but egoism took a few years.
(In case it isn’t obvious from that, I did not have a very good childhood.)
I remember coming close to rediscovering pseudoformalism and the American caste system, but I discovered those concepts before I got all the way there.
Cartesian skepticism and egoism, when I was maybe eleven. I eventually managed to argue myself out of both—Cartesian skepticism fell immediately, but egoism took a few years.
(In case it isn’t obvious from that, I did not have a very good childhood.)
I remember coming close to rediscovering pseudoformalism and the American caste system, but I discovered those concepts before I got all the way there.