Munur á milli breytinga „Hellenísk heimspeki“

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*Á [[Stanford Encyclopedia of Philosophy]]:
**[http://plato.stanford.edu/entries/skepticism-ancient/ „Ancient Skepticism“]
**[http://plato.stanford.edu/entries/carneades/ „Carneades“]
**[http://plato.stanford.edu/entries/epicurus/ „Epicurus“]
**[http://plato.stanford.edu/entries/pyrrho/ „Pyrrho“]