Honestly, that is in the same level of saying that you doubt the consensus on Evolution.<p>I say this not to disparage, but you are simply ignorant about the subject. If you read about Psychometrics and perhaps work by Charles Murray et alii you will realize right now you don&#x27;t know what you are talking about. Start on YouTube and listen to Dr. Murray and he&#x27;ll give you more papers to read and keywords to look for.<p>The consensus exists and you can verify it for yourself if you care to.