Whenever I Google smartest person, William James Sidis comes up and it says that his IQ was between 200 and 300. Yet when I read his Wikipedia page, their are a lot of disputes about his intelligence and say that many of them were exaggerated and false. Leonardo da Vinci is also cited as the most intelligent person of all time and that is more credible as he has tons more scientific and artistic accomplishments than Sidis. Yet, we will never know how smart he is because they really didn’t have the ability to test intelligence when he lived. Marilyn Vos Savant and Walter O’Brian are also said to have the highest IQ’s but they too are dubious and possibly exaggerated. Einstein seems like a contender as his brain was examined to be thicker in certain areas but obviously IQ tests are not reliable as he scored only 160 which is considered low genius. Finally, I once read that their was a Middle Eastern man who was tested with a more accurate scale that measured 7 types of intelligence and he scored a near perfect 198 out of 200. I forget his name. Anyway their are so many dubious claims to who is the smartest person to have ever lived and I was wondering if anybody has some evidence on a particular person who may be considered the smartest; not based on IQ scores or accomplishments; but instead quaila or a profound understanding of reality that is higher than any other person. Does anybody have any contenders. Their are no wrong answers. Just provide some proof?