1/ To improve your knowledge you can learn something (true) or unlearn something (false).
2/ We naturally gravitate to learning, because it's easier not because it's better.
3/ Only a fool allows everything to indiscriminately stay in their mind.
4/ Useless knowledge makes the more useful knowledge harder to employ.
5/ Worse still, as we put more and more useless knowledge in, it becomes harder to distinguish the useful from the useless.
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