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Bill de hÓra wrote,
> We're always optimizing, just not always optimizing for performance.
> For the hillclimbers among us:
>
> http://citeseer.nj.nec.com/wolpert95no.html

Fascinating. Go back twenty years to the late 70's and you'll find a 
flurry of papers debunking Popper's "truthlikeness" metric on more or 
less exactly the same grounds: given a metric which gives you a ranking 
of theories by accuracy, you can always derive (in a reasonably 
non-perverse way) other metrics which give you arbitrary reorderings of 
that ranking.

Google for "Graham Oddie truthlikeness".

Cheers,


Miles

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