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The Hempel paradox tells us that each sighted white swan confirms that crows are black<ref>Here we obviously refer to the well-known paradox called "of the crows", or "of the black crows", formulated by the philosopher and mathematician [[:wikipedia:Carl Gustav Hempel|Carl Gustav Hempel]], better explained in Wikipedia's article ''[https://en.wikipedia.org/w/index.php?title=Raven_paradox&oldid=942633026 Raven paradox]'':<br>Voir {{cita libro

Le paradoxe de Hempel nous dit que chaque cygne blanc aperçu confirme que les corbeaux sont noirs<ref>Here we obviously refer to the well-known paradox called "of the crows", or "of the black crows", formulated by the philosopher and mathematician [[:wikipedia:Carl Gustav Hempel|Carl Gustav Hempel]], better explained in Wikipedia's article ''[https://en.wikipedia.org/w/index.php?title=Raven_paradox&oldid=942633026 Raven paradox]'':<br>Voir {{cita libro

  |autore = Good IJ

  |autore = Good IJ

  |titolo=The Paradox of Confirmation

  |titolo=The Paradox of Confirmation