Is the boundary between wakefulness and sleep blurrier than commonly thought?

Imagine you're playing with your favorite toy, you're wide awake and having so much fun. But then, slowly, you start to feel sleepy, like the toy is getting softer and quieter. You go from being completely awake to asleep, but it's not like flipping a switch, it’s more like sliding down a ramp.

Sometimes, when you're falling asleep, your brain is still doing things! It might be thinking about the fun you had during the day, or even dreaming just a little bit. That means you can be half-asleep, like being in a dreamy daze, not fully awake, but not completely asleep either.

When you wake up from sleep, it's not always a big "Oh! I'm awake!" moment. Sometimes your brain is still sleepy and takes a little while to catch up, like how it takes time for your eyes to adjust when you turn on the lights at night.

So the line between being awake and asleep isn’t as sharp or clear as you might think, it's more like a gentle slide than a sudden jump. Imagine you're playing with your favorite toy, you're wide awake and having so much fun. But then, slowly, you start to feel sleepy, like the toy is getting softer and quieter. You go from being completely awake to asleep, but it's not like flipping a switch, it’s more like sliding down a ramp.