“How do you relate food preparation to free will?” she asks as they move along.

"—I'm not sure I understand the question, ma'am."

“I'll simplify it, then. Why do you have a kitchen?”

"To provide robots with a variety of environments so their Free Will can shine through!"

“Perhaps you can arrange a demonstration of this ‘free will’.”

"—I'm afraid I can't, ma'am, for the very nature of the thing is that it is undemonstrable and unpredictable."

“Is that what you put in your grant proposals?”

"—well, I should say it is impossible to demonstrate at will, but the recordings contain the data, ma'am."

And what does the data say, before it's been turned into jargon?

It consists of very minutely described observed behaviour in the chambers compared with... what looks a lot like itself. Except it comes from the servers.

Then, what data's flowing into the servers?

...observational data from the robots in the various rooms, apparently. More specifically, all of their sensors.

Back where their bodies are: “— can you explain what redundant computing possibly has to do with ‘free will’?”

"...what?"

“—sorry, I should know better but this place is getting to me.

“What I see here is that the robots’ minds are running in two places. They are in the robots and they are also on extra servers nearby,” waving at a piece of the newly-obtained map of the Free Will Experiment Station, “and their ‘research results’ are comparisons of the copies.

“With me so far?”

"Yes."