Great sketch, so complex in its details and the use of the "magic" eraser gives a nice effect. Initailly, tbh, I was drawn by the title: "Diagnosis Tree" is a term that is used in Medicine, for automated diagnosis supplied by machine learning algorithms. I messed with this sh*t some years ago when trying to figure out my MSc Dissertation, and abandoned it because it had a much larger scope than I intended.

Medical terms are always fascinating :)