Who developed an argument prior to Descartes that was similar to the Cogito argument?

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Augustine developed an argument prior to Descartes that was similar to the Cogito argument. Augustine's argument states "If I am deceived, I exist" which is similar to Descartes' "I think, therefore I am." Both arguments center on the idea that the act of thinking proves a person's existence. Augustine developed an argument prior to Descartes that was similar to the Cogito argument in his Confessions. Augustine wrote, "I am certain that I am a thinking thing." This statement expresses a similar idea to Descartes' famous quote, "I think, therefore I am." Both arguments rely on the idea that the very act of thinking, doubting, or questioning one's existence proves that some kind of existence or consciousness is present.

Who Developed an Argument Prior to Descartes That Was Similar