The notion of truth is not definable in any formal system that is strong enough to include arithmetic.

"Technology is the knack of so arranging the world that we don't have to experience it."

孔子说：“不懂得客观规律，就不能做君子；不懂得道德规范，就无法建功立业；不懂得分辨言论，就不能了解人。”

大脑只是一大堆技巧的集合。