Sherlock on knowledge

I consider that a man’s brain originally is like a little empty attic, and you have to stock it with such furniture as you choose. A fool takes in all the lumber of every sort that he comes across, so that the knowledge which might be useful to him gets crowded out, or at best is jumbled up with a lot of other things so that he has a difficulty in laying his hands upon it. Now the skillful workman is very careful indeed as to what he takes into his brain-attic. He will have nothing but the tools which may help him in doing his work, but of these he has a large assortment, and all in the most perfect order. It is a mistake to think that that little room has elastic walls and can distend to any extent. Depend upon it there comes a time when for every addition of knowledge you forget something that you knew before. It is of the highest importance, therefore, not to have useless facts elbowing out the useful ones.

It is a capital mistake to theorize before you have all the evidence. It biases the judgment.

Sherlock Holmes, by Arthur Conan Doyle in A Study in Scarlet

Every act has consequences that change that world in some way, no matter how modest, and those actions will go on changing the world for millennia after we are gone. But to remember the details of every action is to invite madness, to paralyze our brains and our communities with memory.

Gavin Francis, The Dream of Forgetfulness (NYRB, March 9, 2023)

 

Men do not know the natural disease of the mind; it does nothing but ferret and inquire, and is eternally wheeling, juggling, and perplexing itself like silkworms, and then suffocates itself in its work;  It thinks it discovers at a great distance, I know not what glimpses of light and imaginary truth: but whilst running to it, so many difficulties, hindrances, and new inquisitions cross it, that it loses its way, and is made drunk with the motion.

Montaigne

The real benefit of complex inferences like weighing uncertainty may not be apparent unless the uncertainty has complex structure.

Quoted in Science News, "There’s a long way to go in understanding the brain," 7/25/2017)