 Can you at least show us some stimulus class? No, that stimulus has class. No, that's not what we mean. Although that doesn't really, you know what? That might actually work because something classy, right? So a stimulus class is just a group of stimuli that are similar along some dimension, like, I don't know, temporal locus and functional dimensions and I don't know, what does it say? Formal, temporal, or functional dimensions. A bunch of stimuli all basically mean the same thing and you vote the same response or elicit the same response. What's an example? There's lots of different kinds of light switches. You kind of know what to do with all the light switches unless you get the one light switch which doesn't control the lights, which is always weird to try and figure out what it controls and that, I don't know what this does and you keep pressing it and trying to figure it out. That's because that particular stimulus belongs to a stimulus class, but it's not producing the reinforcer that's normally produced by manipulating the stimulus in that stimulus class. So it gets you all confused, right? So stimulus class is just any stimulus that evokes a similar response gets you to admit a similar response, you know? Like all these lights around me, they just make me say light.