"You still remember, right? Back in the thirties, Xiang Shan taught you all this stuff. Don't forget, don't forget," Ingrid repeatedly emphasized to Yawgmoth.
"Hmm, is now the time for an interdisciplinary discussion?" Yawgmoth seemed a bit bewildered.
...
Yawgmoth picked up his notebook. After dinner, he had debated with Ingrid all the way through. But perhaps because he had eaten too much, this memory was a bit blurry. Ingrid had even chased after him the whole way.
But...
—No, wait...
—The version Inga spoke of, must be the "preliminary version" we proposed at the beginning of the thirties, which was not a mature concept. I myself in the thirties... the thirties...
What year was that paper from...
