MomBrain does not have to rummage deeply into her purse to find the Universal Translator. This is because she uses it so frequently.
Dr. Science: My tendency to sneeze increases when I’m at home.
MomBrain: Maybe you’re allergic to the cats.
Dr. Science: That’s a hypothesis I haven’t tested properly.
MomBrain: Maybe it’s the cats. Maybe you should test them.
Dr. Science: Perhaps. But I need an independent variable.
MomBrain: The cats are independent.
Dr. Science: Yes, but they are not independent variables.
MomBrain: But their moods are variable. I mean, they’re fickle. So the cats are independent and variable, right?
Dr. Science: Yes. No. Yes. But no.
Dr. Science: YES.