 The sceptical consequences of the Always Dreaming Doubt are even more devastating than those of the Now Dreaming Doubt. If I do not know that “normal waking” experience is produced by external objects, then, for all I know, all of my experiences might be dreams of a sort. For all I know, there might not be an external world. My best evidence of an external world derives from my preconceived opinion that external world objects produce my waking experiences. Yet the Always Dreaming Doubt calls this into question: