philosophyforums Edit

Member Banno Here's where the muddle comes to the fore. "I think, therefore I am" is valid because it is an example of existential instatiation, thus presupposing a language in which the instatiation can take place. Languages are never private(Wittgenstein). Hence his certainty is built on his membership of a linguistic community.

Member Scg8866t Edit

Member Scg8866t seems to grasp the circularity problem. What exactly is this “I” that Descartes uses in his argument? Can Descartes have knowledge of it? One might naturally assume that this “I” refers to the self as a thinking subject. But if the “I” refers to a thinking subject, then Descartes argument is flawed in that it commits the fallacy of begging the question. Descartes is trying to prove that he exists as a thinking subject, but by stating that ‘I think’ (in the premise), he automatically presumes that he exists as a thinking subject...

Vongehr Edit

From "Cogito, Ergo Sum" to the Exponential Function: A Derivation via the Principle of Evolution (1997)

Links Edit

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