@tihmstar nah, the probability is just tied to the population number, 15 standard deviation. Right now there could be a person with 192. When there's 10-11 b of us, there could be one with 193.
But about the test itself, the result doesn't wear off or grow much with experience/education, yeah well age might decrease it a bit in the long run ofc. I did one ~20y apart, same result, although the training has sure grown and the memory is certainly generally worse, the intuition about logic remains