I was recently thinking of some extremely intelligent people I have known.. All are retired (or near) and all three in my thoughts were male. #3 was one of my college roommates who graduated undergrad with a major(s) in Math and Chemistry. He did his Master's in some form of chemistry at MIT, then did a PhD at the UC Boulder in Colorado and was a professor there in the Chemistry Department the last time I saw him. #2 Was a close college friend who was smart enough that the faculty in the college we attended decided he could develop his own major and curriculum. The faculty reviewed and graded his work, but he was free to take or not take classes, and taught himself completely independently, and I don't recall what his major(s) were, but he wasn't interested in any of the sciences as I remember, but he was brilliant in History, Literature, Languages, Sociology, Psychology, Philosophy, and Theology. He attended Law School (perhaps, Stanford, I can't remember) and is now in the waning years of his career in International Law in the Bay Area of California. He is the only one I am still in touch with. #1 Is a medical doctor I met in Illinois . He attended Northwestern Medical School after a 4.0 undergrad record. He found Medical School not to be a challenge, so he completed a Masters in Pharmacology while attending medical school. He had a full-ride scholarship to both programs, so no student debt. He was the only son of a wealthy family anyway, so income was not an issue. He had an Internal Medicine practice for 2 or 3 years (a requirement of one of his scholarships) and only saw 8- 16 patients a day and he had only one employee. He read the latest Wintrobe textbook at least once a year from cover to cover (He was interested in Hematology) as well as several others annually. He began each day at 4:00 AM reading tests and journals until he did rounds at the hospital beginning at 7:00 AM. After rounds, he manned his office from ~8:00 until 4:30 PM when he went on afternoon rounds. He had call duties at the hospital, and when he didn't we went out on the town as we were both single then, and he began his studies again in the evening, allowing about 4 hours of sleep nightly. When he had completed his obligation, he did an Emergency residency and started a Paramedic program in Peoria at St. Francis. He was very dedicated to that until he discovered that most of his students did not re-certify. Illinois at the time required re-certification for Paramedics every 18 months. He left Peoria, and did an Oncology Residency at Charity Hospital in New Orleans. After a couple years at that, he decided to do yet another residency in Bone Marrow Transplantation at the UW in Seattle and returned to Louisiana to become the Bone Marrow Transplant supervisor and Coordinator for the State of Louisiana. I lost track of him now, but according to the internet, he still has practices in Louisiana and In Illinois. The smartest person I have ever known. How about you? Do you have or have you had extremely intelligent friends or acquaintances?