Quite likely some of them had ties to the ETH or they organised the conference. Yes, Rutishauser would have to be Swiss, with that name. Thanks for clarifying.

Then, were the German speakers Germans, living in Zürich, or Swiss?

Edit: I see your edit now. That was indeed my (genuine) question.

I commented on the article’s content, not the title. Among others:

“The German authors made two big conceptual leaps in their formulation of the “if” statement.”

The title is correct, maybe by accident.

The Germans, from Zürich, Switzerland?

That didn’t happen.

And if it did, it wasn’t that bad. And if it was, that’s not a big deal. And if it is, that’s not my fault. And if it was, I didn’t mean it. And if I did, you deserved it.