In the 1950s, legendary behaviorist B.F. Skinner debuted his version of a “teaching machine,” based on the 1924 invention of Ohio State University psychology professor Sidney Pressey. The contraption was loaded with a piece of paper with questions, and students pressed keys indicating the correct answer, at which point another question would appear. Both Pressey and Skinner ran into similar problems, though, failing to implement the technology in schools. Educators weren’t convinced of the machine’s benefit, which prioritized individually paced learning not conducive to students of the same age moving through a grade level at the same time.
needs to do non-trivial computation (assuming we also get rid of dot。关于这个话题，体育直播提供了深入分析
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FD files as decision traces。关于这个话题，体育直播提供了深入分析
Another trick that becomes less available if you blindly apply queries