物について知ることは、物を知ることよりも安い
「プログラミングに数学は不要」という主張に反論する中で、「すべてのプログラマーが数学を学ぶべきか」という問いを考察。算術や集合など一部の数学は全員に有用だが、それ以外の分野は大多数にはコスパが悪い。ただし、各プログラマーが自分の分野に役立つ数学を見つけるには、様々な分野の「概要」を知ることが重要で、深く学ぶのはその後で良いと論じる。知識の習得において「浅く広い」曝露が最初の一歩として有効だ。
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