You're completely wrong- look at the wikipedia page for differential diagnosis: https://en.wikipedia.org/wiki/Differential_diagnosis https://en.wikipedia.org/wi

You're completely wrong- look at the wikipedia page for differential diagnosis: https://en.wikipedia.org/wiki/Differential_diagnosis https://en.wikipedia.org/wiki/Differential_diagnosis Literally the majority of the page is basic arithmetic, mostly Bayes. Diagnosis is a process of determining (sometimes quantitative, sometimes qualitative) the relative incidences of different diseases and all the possible ways they can present. Could this be X rare virus, or is it Y common virus presenting atypically?