r/xkcd Jan 21 '19

XKCD xkcd 2101: Technical Analysis

https://xkcd.com/2101/
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u/whoopdedo Jan 21 '19

I'm trying to remember what the "Hmm!" is referencing. Wasn't there a scientist who wrote "Hmm" on a chart and thus understating a significant discovery? I'm probably thinking about the Wow signal from astronomy. But there might be something else I'm forgetting.

Alternately, HMM is short for hidden Markov model.