Descartes says that for all he knows he might be dreaming and that “there are no certain indications by which we may clearly distinguish wakefulness from sleep.” Have you ever had such a clear dream...

Descartes says that for all he knows he might be dreaming and that “there are no certain indications by which we may clearly distinguish wakefulness from sleep.” Have you ever had such a clear dream that even afterwards you thought it might not have been a dream? Have you ever had a dream in which you wondered whether you were dreaming? Do you think Descartes is right that there are no “certain indications” by which you can tell whether you are dreaming or not? notice he suggests that in dreams things do not seem as “clear and so distinct” as they do when we are awake. Do you think this “clarity and distinctness” indicate a clear difference between your own dreaming and being awake? Do you think you can tell whether you are in a dream by checking to see how “clear and distinct” things seem to be? Is it possible that you could be dreaming right now?