It was the day of the Lord 12 February 1989, such as they count in the Old World. I was in the Old World that day, which I know precisely, because I found a trace of it in my keepsake box. Two days before Valentine’s Day of that year which brought about the Fall of the Iron Curtain, I was sitting in a giant lecture hall at the Rheinish Westfaelische Technische Hochschule Aachen (short, RWTH) for the midterms in Theoretical Quantum Mechanics.
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