It is not a misquotation. In Meditations on First Philosophy what he says translates to "I think, I am" but he'd used "Cogito ergo sum" (I think, therefore I am

It is not a misquotation. In Meditations on First Philosophy what he says translates to "I think, I am" but he'd used "Cogito ergo sum" (I think, therefore I am) in previous works. Subtlely different meanings to be parsed...