By the end of Meditation III, Descartes is willing to admit three things he no longer doubts. Identify the thing that Descartes still has reason to doubt. a. I think
b. The physical material world exists
c. I exist
d. God exists

Correct

b. The physical material world exists

Explanation:

Descartes is an accomplished philosopher whose works is well known. Part of his work is his writing on Meditation which is a series of his personal reflections he penned down in a book.

In The Meditations on First Philosophy,  which was written by him in a similar autobiographical style as his other work the Discourse, he describes a six-day philosophical journey from radical skepticism to rational certainty. The only thing he still have reasons to doubt is the physical world existence.

john locke and voltaire