Key points are not available for this paper at this time.
What is often called Descartes' dream problem (‘How do I know that I am not now dreaming?’) should perhaps be called Plato's dream problem instead. Certainly it can be found in Plato's Theaetetus at 158b–c. It can also be found in Cicero ( Academica 2.27.88) and, through Cicero's influence, in much of the work of St Augustine.
Gareth B. Matthews (Thu,) studied this question.