It’s one of them.

Flawed assumption. It could be both. You’ll need to eat there at least two more times to find out, assuming each trial yields 100% certainty.

Edit: I thought it should be obvious that we’re taking them absolutely at their word that they’ve properly isolated these two variables because this experiment exists inside a joke and never happened. The whole point of the joke is that the methodology is god awful and completely unrealistic, so questioning that they’ve truly isolated the variables is pointless.

Edit 2: Wait, I totally misread the experiment setup. @[email protected] is entirely correct that they’ve eliminated nothing if the experiment is totally defined by 8 bowls and 8 bouts of diarrhea. They’re still converging on at least one cause, but there could still be others. My career is ruined.

In fact, they could be allergic to some or all of the ingredients eliminated. Or to the delivery driver’s personal hygiene.

Or the bowls. Or something at that location…

Or it’s completely unrelated and just so happened to coincide with his visits.