If it's a truly random sample [1] it's perfectly valid; there would be no reason to think that the other images have less frequency of CSAM. [1] The methodolog

If it's a truly random sample [1] it's perfectly valid; there would be no reason to think that the other images have less frequency of CSAM. [1] The methodology just says "To collect the sample, researchers used a licensed third-party tool to select 20,000 posts at random out of all Grok posts that contained an image"