Comment by tptacek

I don't know about "83" (the number I always see is 100), but: IQ tests are less discriminating at the high end, and test-retest reliability drops at the high end (the "high end" of an IQ test might just be testing grit or fatigue). I think it's widely understood that IQ is unreliably ordinal as scores increase.

You definitely don't need to dip into the Peterson Cinematic Universe to look this up!