 My mind doesn't linger on the imagined object. It just kind of switches between the two. Wow. It was actually the first sort of objective method to measure visual imagination. Since then, we've developed a few other ways. And Jules continued to find these like objective ways to see a difference. Like he did this one experiment looking at people's eyes. If you look up at the light, our pupils contract, right? When you're in the dark, of course, your pupil opens right up.