(I work for the university Psychology department where several labs have students participate in experiments. A girl is wandering around the hall looking lost.)

Me: “Excuse me, but you look a little lost. Can I help you find something?”

Volunteer: “Yeah, I signed up to participate in an experiment, but I don’t remember which one or what the requirements were.”

Me: “Alright, that’s fine. We can look you up on one of our computers. Can I have your name?”

Volunteer: “[Name].”

(I go to the office computer and her name, the experiment and the requirements.)

Me: “Alright, well it looks like you’re going to be in the lab down the hall and the only requirement is that you should be a native English speaker.”

Volunteer: “Oh, but I don’t know that language.”

Me: “What language?”

Volunteer: “Native English, I’m not familiar with that language, only regular English. I’ll just go tell them I can’t do it. Thanks!”