'''Protagoras''' (c. 490 - c. 420 BC) was a [[Presocratic Philosophy|Presocratic]] [[Greek]] [[philosopher]].
'''Protagoras''' (c. 490 - c. 420 BC) was a [[Presocratic Philosophy|Presocratic]] [[Greek]] [[philosopher]].
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Diogenes Laertius' book "Lives of the Philosophers" is source for many early Greek philosophers including Protagoras; but this work was compiled over six hundred years after Protagoras' death and consequently not accurate. [[Plato]] also wrote about Protagoras; [[Aristotle]] regarded Protagoras as who first introduced a spiritual principle, as a sober man among the inebriated.
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Diogenes Laertius' book "Lives of the Philosophers" is source for many early Greek philosophers including Protagoras; but this work was compiled over six hundred years after Protagoras' death and consequently not accurate. [[Plato]] also wrote about Protagoras,considering him a sophist; [[Aristotle]] regarded Protagoras as who first introduced a spiritual principle, as a sober man among the inebriated.
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He could be considered an [[Agnosticism|Agnostic]] and Relativist.
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He could be considered an [[Agnosticism|agnostic]] and relativist.