Abstract
Knowledge is important for us, human beings, for a variety of reasons, starting with trivial but necessary reasons to live your life. Western man also has a collective project that is constitutive of its culture: science; and the aim of science is to gather knowledge about the world in its broadest meaning: from the origin of a particular disease to the origin of man, life, planet Earth and the universe, from why the orbits move as they do to why a mass of people behaves differently from individuals, from why the sky is blue to why the sea is salty, from why the climate seems to change to why rainbows appear, etc. etc. The quest to understand what knowledge is, is as old as philosophy itself, and the philosophy o.