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fractalman comments on Truly Part Of You - Less Wrong

59 Post author: Eliezer_Yudkowsky 21 November 2007 02:18AM

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Comment author: fractalman 24 May 2013 05:08:41AM 7 points [-]

I think nominul does understand it, and at one level higher than you do. he understands the principle so well he goes and makes a tradeoff in terms of memory used vs execution time.

Take a symetric matrix with a conveniently zero'd out diagonal... you could go and memorize every element on the matrix....(no understanding, pure rote memorization).... you could go and memorize every element AND noticing it happens to be symmetric...(understanding, what you seem to be thinking of...) Or noticing it happens to be symmetric and then only memorizing half the entries in the first place(nominull's approach).

I go with nominull's approach myself...I'm just a lot sloppier about selecting what info to rote memorize.