http://general-terms.thesaurus.ekt.gr/vocabhttp://general-terms.thesaurus.ekt.gr/vocab?tema=11077sophists http://general-terms.thesaurus.ekt.gr/vocab?tema=11077 philosophical schools BT http://general-terms.thesaurus.ekt.gr/vocab?tema=11077 sophism RT http://general-terms.thesaurus.ekt.gr/vocab?tema=11077 relativism RT