Argument by Proof

I am thinking

from Descartes

by    @alexandershortt · 02/15/24


1
For any proposition P: If it is not possible for an evil being of supreme power to convince me of P when P is false, then I cannot rationally doubt P
2
It is not possible for an evil being of supreme power to convince me that I am thinking when it is false that I am thinking
3
I cannot rationally doubt that I am thinking
4
I am thinking