In order to establish any firm and lasting knowledge, for Descartes, what must he do?
A) Trust in his senses
B) Prove that God exists
C) Consider what he can know if he assumes that God exists
D) Find something certain and indubitable that can act as a foundation for whatever one knows

Question

Quizplus · Accepted Answer

Descartes believed that in order to establish firm and lasting knowledge, he must find something certain and indubitable that can serve as a foundation for all other knowledge, famously expressed as "Cogito, ergo sum" (I think, therefore I am).

In Order to Establish Any Firm and Lasting Knowledge, for Descartes