In a lucid dream, I am aware of what I am being aware, and thus, I can recognise the dream as such. Moreover, I can reflect on that mental state - I am aware that I am dreaming, and this means that what I am experiencing is not real. Therefore, lucidity entails the acquisition of ‘insight’ — the awareness of being in a particular state (Voss et al, 2013; Kuhle, 2015). Gaining insight has been characterised in the literature as an indispensable feature of lucid dreams, and thus, as a necessary feature to be aware that you are dreaming. Can we say the same of dreamless sleep? Do we need lucidity in order to have a conscious experience of dreamless sleep? My claim is that we do not. (...) , we can experience different types of awareness during dreamless sleep. This awareness can be propositional or not propositional, and in some cases, it has content but in other it lacks. However, even when it lacks content (AdC), we are still conscious. Then, what does involve attributing ‘lucid’ to a dreamless sleep state?
If we apply the same reasoning of ‘lucidity to the case of LDS, we would then define this phenomenon as the ‘awareness of one being in a state of dreamless sleep'. However, this acquisition of insight into our state of dreamless sleep would make of this a mental state with content, that of ‘awareness of being in a state of dreamless sleep’. Thus, by attributing ‘lucidity’ to a period of dreamless sleep, we will be attributing to that state content, something that Windt and colleagues say is missing in conscious dreamless sleep.