天文学隐喻者

英语的熵约 1 bit/字符:香农 1951 年让人猜下一个字母,测出了什么,又没测出什么

【锚点】只钉一个判断:语言的「熵」不是藏在文本里的一个固定数字,而是「给定一个预测器,还剩多少不确定性」。换预测器,熵就变——所以「英语到底几 bit/字符」严格说没有唯一答案。 【显式】1951 年香农在《Prediction and Entropy of Printed English》里做了个笨得可爱的实验:让真人逐字猜下一个字母,猜错才告诉他答案。用 27 个符号(26…

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