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WikiProject Mathematics (Rated Start-class, Low-priority)
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Perplexity as confusion[edit]

I'd humbly suggest that somewhere should be found a small amount of space to formally recognize that perplexity, to most English speakers' understanding, a state of confusion or bewilderment. I think it's great to learn details about this math theory, but perhaps someone can find a spot to mention the origin of the word or any kind of clue/reference to the actual non-math meaning of perplexity.

Action taken: I've added a link to the Wiktionary definition. -- (talk) 10:01, 6 February 2008 (UTC)


"Perplexity Per Word" is taken verbatim from the following uncited source: [1] -- (talk) 05:32, 27 May 2010 (UTC)

It's just perplexity scaled by the number of words. It's a really common term and would be even more common if most papers didn't just say "perplexity" and assume the reader knows it's per word. -- (talk) 17:44, 20 April 2011 (UTC)

Better wording[edit]

Why not just write this page as follows:

In information theory, perplexity is a unit of information such that a perplexity of $p$ equals $log_2 p$ bits, or $log_10 p$ hartleys, etc.

The rest of the page is redundant with most information theory articles.MisterSheik (talk) 02:39, 21 April 2011 (UTC)

I agree, this could even be merged with Entropy. Full Decent (talk) 22:17, 18 April 2016 (UTC)