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the ancient Greek sophist Gorgias thought it had to be characterized by a sceptical attitude towards the things appearing to our eyes;

according to Socrates the philosopher is aware of not owning the knowledge; so he has to actively go to look for it, being the art of questioning
the veritable art of thought and the dialogue the only possibe way to attempt to reach the truth;

according to Immanuel Kant and his "noumenos unreachability" philosophy has nothing to say about the things and/or the world but it aims, for a general interest, to rectify the human knowledge;

according to Ludwig Wittgenstein the philosophical problems stem from a bad/unappropriate use of the words; so philosophy should be an activity aimed to clarify and semantically amend the obscure and indistinct thoughts;

according to Friedrich Nietzsche there are not truths but only lies to unmask; so philosophy would be above all an artof interpretation and evaluation.

And according to you what should it be? And what should be the role of the philosophy in a forum?