I've come across stuff like this before where the "original" didn't actually exist, just all the "copies" on creationist websites.
FWIW this example appears to be genuine so apologies for the implied slur on my part.
However, I'm not particularly impressed by an anecdote from a childhood friend of Uncle Joe, presumably remembered from many years before and recounted from memory to a biographer. Stalin had a tendency to say and do whatever was convenient for Stalin at the time. And if we are to judge him by his deeds we can see that he clearly rejected Darwinist evolution. Lysenkoism was an anti-scientific disaster for soviet agriculture and evolutionary biologists had a tendency to get sent to the Gulags.
stand-alone-complex... neat effect, that. not exactly rare, either. not sure what it says about humans, but I suspect it isn't complimentary