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A comment on The Inconsistency of Arithmetic (2011). Parent comment

Re:The Inconsistency of Arithmetic (2011) by OscarCunningham on Tuesday August 17, 2021 @04:10PM (#28214295)
I'd add on top of that that these days adult IQ is instead defined to have a normal distribution with mean 100 and standard deviation 15. This is achieved by 'grading it on a curve'.

That's why my above comment was explaining why the 230 figure couldn't possibly make sense under the modern definition.

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Re:The Inconsistency of Arithmetic (2011) by btilly on Tuesday August 17, 2021 @04:28PM (#28214476)
An adult test can't give such a score.

However the Stanford-Binet test is still used for children. And in young children can still produce extremely high IQ scores.

Also note that while usually the standard deviation is made to be 15 these days, there are still tests, like the Binet and OLSAT, where the standard deviation is 16. That's why I said that the standard deviation depends on the test.

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