This is a preview of a series where I will be commenting on Popper's "On the sources of knowledge and of ignorance". In this part I remark on my own experience encountering Popper as a university student who took some philosophy subjects - how Popper was presented. How he compares to his contemporaries - like Wittgenstein. Popper's style of writing and as I keep emphasising on ToKCast - Popper's tendency to go to science - to ideas there in science and how it works set him apart. He does not invent "examples in the abstract" - thought experiments are barely a thing for Popper (while they are almost everything for Wittgenstein). Popper speaks about concretes - what was actually done, why and how. So I do this because I need a break from critiquing all those other philosophers and philosophies I have been - the contrast is stark between Popper and almost all others. Wittgenstein may be "the philosopher's philosopher". He can keep the title. Popper is "the anti-philosopher philosopher" - and a hero for being so.