(Since you two seem to be mostly using the mentioned IQ scores as a way to indicate relative intelligence, rather than speaking of anything directly related to IQ and IQ tests, this is somewhat tangential; however, Mr. Newsome does mention some actual scores below, and I think it's always good to be mindful when throwing IQ scores around. So when speaking of IQ specifically, I find it helpful to keep in mind the following.

There are many different tests, which value scores differently. In some tests, scores higher than about 150 are impossible or meaningless; and in all tests, the higher the numbers go the less reliable [more fuzzy] they are. One reason for this, IIRC, is that smaller and smaller differences in performance will impact the result more, on the extreme ends of the curve; so the difference in score between two people with genius IQs could be a bad day that resulted in a poorer performance on a single question. [There is another reason, the same reason that high enough scores can be meaningless; I believe this is due to the scarcity of data/people on those extreme ends, making it difficult or impossible to normalize the test for them, but I'm not certain I have the explanation right. I'm sure someone else here knows more.])