The debate on continuity between the waking and dreaming minds

In the film Dark City, mysterious pale-skinned creatures rearrange a city and alter the inhabitants’ identities and memories each night. Every morning, residents awaken in a different city with new identities, unaware of what changed while they slept. Though fictional, this scenario seems to mirror an intriguing aspect of our lives—not when we wake up, but when we go to sleep. Each night, as we dream, we often find ourselves in strange environments, experiencing unrealistic or implausible events, intense negative emotions, and even transformations that make us feel like different people. The dream world appears to rupture waking reality, making anything possible. Some researchers argue that this suggests our dreaming life is discontinuous with our waking life. But is this really so? Are dreams a complete break from wakefulness, implying that we lead two separate lives: one grounded in consistency and stability by day, and another filled with fleeting, bizarre experiences at night? This chapter explores whether the relationship between our dreaming mind and our waking mind is best understood as one of continuity or discontinuity. Since continuity and discontinuity can be interpreted in different ways, we examine various dimensions through which this debate can be framed. The first section focuses on the content of experiences, while the second addresses their affective dimension. The third section explores the continuity and discontinuity of the self in wakefulness and dreaming, and the fourth discusses brain activity and other physiological markers. The last section presents some concluding thoughts on this debate.