This age-old philosophical puzzle is more than an idle question.

One of the strange things about dreams is that, most of the time, we aren’t aware we’re dreaming. Typically, our memory and our reflective ability are substantially limited within dreams (Fosse et al. 2003; Hobson et al. 1998), causing us not to notice incongruencies within the dream and to take for granted that what we experience is real. It simply doesn’t occur to us to consider whether it might not be.

Read the full article:

Article by Sharon Hewitt Rawlette Ph.D. originally appears on Psychology Today