Marix wrote:I see your points. But lucid dreaming and dreaming can hardly be regarded as the same. When you constitute characters and kill them in a lucid dream, you are in charge of your world and of course no one will be harmed in real life. When you have a normal dream though, you cannot decide what happens and you believe it to be real at the time. Can you feel pain in dreams? Because to me every emotion including pain is real when I am dreaming.
Ok, this is going to be a mouthful, but it might be worth it ...
The percepts are real in the sense that they make their appearance in consciousness. All types of perception---waking life, hallucinations and dreams---have a subjective reality (otherwise perception wouldn't be). But we must learn to differentiate between perception generated by sensory input that tells us something about the objective world and perception elaborately defined by secondhand, and somewhat scrambled, neuronal data.
In the former, your subjectivity reveals a satisfactory picture of the external world of objects; in the latter, the subjective takes a fictional route where perception becomes an expression of subconscious schemas and retained information. The illusory worlds in dreams have no objective reality---in this sense we may say what is perceived isn't real---even if such experiences emulate the ones constrained by the act of sensing objective reality itself.