I have a question jpm why do you seem to be antagonistic towards me? Or have I misinterpreted it. You deleted my first post where I posted a website that explains the quadrant model and now you are trying to disagree with me right off the bat. It doesn’t even appear you looked into the theory or even have a desire to, you just immediately tried to be negative towards it and find disagree. It seems like you want to immediately dismiss it. Or maybe my interpretation is incorrect, am I correct? Here is an article on the blood types
It was subsequently found that the Czech serologist Jan Janský had independently pioneered the classification of human blood into four groups in 1907, but Landsteiner’s independent discovery had been accepted by the scientific world while Janský remained then in relative obscurity. However, in 1921 an American medical commission acknowledged Janský’s classification. Jan Janský is nowadays credited with the first classification of blood into the four types (I, II, III, IV).
“Janský’s classification remains in use today. In Russia and states of the former USSR, blood types O, A, B, and AB are respectively designated I, II, III, and IV. The designation A and B with reference to blood groups was proposed by Ludwik Hirszfeld.”
By the way I have a question. Is it ok if I post a website on the quadrant model so that I don’t have to post you that quote there, because that quote is on the website?