Regarding Lincoln: I realized I was not clear. There are lots of places I can point to regarding Lincoln and Marfan Syndrome, but none that have been able to define the unique thought pattern, and only a few that mention it. Marfan involves connective tissue, which is everywhere. The best I can tell you about thought patterns is that the usual thought system uses feelings to make decisions quite rapidly, and logic to justify the decision later. Marfan people usually don't have good access to feelings, and are more apt to make slower decisions beginning with logic. Some suggest it is a form of autism, related to Aspergers syndrome. As autism can run the gamut of how severely one is affected, so can Marfan. It is a very hard thing to judge.