Twain captures something schools rarely advertise: that institutional learning and genuine intellectual growth often work at cross-purposes. Memorizing facts for exams dulls the appetite for the kind of curious, aimless reading that actually shapes how we think—he valued slouching through libraries far more than sitting upright in classrooms. A modern software engineer might spend years mastering coding bootcamps while missing the deep systems thinking that comes from building something nobody asked her to build. The real sting is that we've confused credentialing with knowing, and Twain refused that bargain.