You can know the name of a bird in all the languages of the world, but you'll know absolutely nothing whatever about the bird...Look at the bird and see what it's doing. That's what count. There's a difference between knowing the name of something and knowing something!R.P.Feynman
Muore Mandelbrot. La moglie alla veglia funebre: "Guardatelo da vicino, sembra ancora Mandelbrot"
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