Computers are useless. They can only give you answers.

[Los ordenadores son inútiles. Sólo pueden darte respuestas.]

Pablo Picasso (1881-1973) Spanish painter and sculptor

(Attributed)

The above is a later paraphrase of the original, in William Fifield, "Pablo Picasso: A Composite Interview," The Paris Review (Summer/Fall 1964): "I feel I am nibbling on the edges of this world when I am capable of getting what Picasso means when he says to me -- perfectly straight-facedly -- later of the enormous new mechanical brains or calculating machines: 'But they are useless. They can only give you answers.' How easy and comforting to take these things for jokes—boutades!" More here.