Windt usefully enlarges the concept of dreamless sleep experience to include a variety of different dreamless sleep states (see Section 4 of her commentary). These states include lucid dreamless sleep (especially the experiential transition from lucid dreaming to lucid dreamless sleep), a possible subclass of white dreams (in which individuals describe the impression of having dreamed but are unable to describe the dream in any detail), subjective insomnia (in which some individuals may maintain pre-reflective awareness of their ongoing sleep state while mistakenly conceptualizing their state as wakefulness), in addition to the contemplative practices of lucid dreamless sleep that I describe. Windt’s taxonomy is groundbreaking and opens many new avenues for the experimental neurophenomenology of sleep. This is exactly the kind of work I envisioned when I suggested that we need a more fine-grained and phenomenologically informed taxonomy of sleep states.