I am reasonably but not totally happy with it I feel that it is slightly unfair to the subject since it implies that this is merely his estimate His estimate would seem to derive from the estimates of others so I am not sure why it needs to be described in a way that implies it is quite this subjective Personally I don t believe it is even necessary to state a number in the opening line I would suggest something such as the following Christopher Michael Langan born c 1957 is an American autodidact He is well known for claims by himself and others that he has scored extremely high on IQ tests 1 Billed as by some accounts the smartest man in America etc Possibly this is not perfect either