“My analysis proves beyond a doubt that it would be impossible for the different letters that appear in the Obama birth certificate to have been typed by one typewriter”
I don't find the lower case letters that different,I am just a layperson not a typographer but I do find the uppercase comparison pairs RR, KK and SS do make a far stronger case.
Well, hell, even the preprinted square check boxes on the form and the preprinted letters look different from one another because of computer digitized anomalies.