 Anyway, conditioned reflexes. Conditioned reflexes, it's a CR. It's a CR or a conditional reflex, as Ivan Pavlov once said. More correctly, it was conditional reflexes. All this stuff. It's a conditioned response. It is something you learn through ontogeny. It is the result of classical conditioning. So when you think of Pavlov's puppies, I like to call them puppies, it makes them nicer. So you've got Pavlov's puppies, they have this metronome. Meat powder, metronome, meat powder, it wasn't a bell, metronome, meat powder. And eventually you go metronome in the dark, salivation all over the place, right? The salivation in that case, to the sound of the metronome, is a conditioned reflex. Some people think the conditioned reflexes have to be exactly like the unconditional reflex. They don't. Sometimes it goes the opposite direction, which is called a compensatory conditional reflex. But anyway, the point is that a learned stimulus, a CS elicits, a special emphasis on the word elicit, a conditional response, or a conditioned reflex, right? Lots of terms get interchangeable here. So CRs, classical conditioning, the effect of presentation of a CS.