And relatedly, what about people that claim to not have any dream at all? > To really be sure that an individual does not dream, we would have to follow him fo

And relatedly, what about people that claim to not have any dream at all? > To really be sure that an individual does not dream, we would have to follow him for years and perform awakenings from REM sleep to see if he dreamed. If the individual never reported a dream after years of awakenings from REM sleep then we could reasonably conclude that either the person does not dream, that he or she lacks the ability to recall dreams, or that he or she is a liar who, for some reason, wants to conceal the fact that he does in fact dream. https://www.psychologytoday.com/intl/blog/dream-catcher/201204/people-who-do-not-dream https://www.psychologytoday.com/intl/blog/dream-catcher/2012...