"In the Chauvet Cave, there is a painting of a bison embracing the lower part of a naked female body. Why does Pablo Picasso, who had no knowledge of the Chauvet Cave, use exactly the same motif in his series of drawings of the Minotaur and the woman? Very, very strange."

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At issue is not only knowledge of the world but our survival as individuals and as a species. All the basic technologies ever invented by humans to feed and protect themselves depend on a relentless commitment to hard-nosed empiricism: you cannot assume that your arrowheads will pierce the hide of a bison or that your raft will float just because the omens are propitious and you have been given supernatural reassurance that they will. You have to be sure.

— Barbara Ehrenreich