Note the text quoted in the image above, but, also, to quote the lowly Wikipedia: "The Athenians believed sortition to be democratic but not elections and used complex procedures with purpose-built allotment machines (kleroteria) to avoid the corrupt practices used by oligarchs to buy their way into office." And yes, indeed, you will find, "sortition" is another word for election at random —by lot or lottery.
https://en.wikipedia.org/wiki/Sortition#Ancient_Athens
Both Aristotle and Herodotus (one of the earliest writers on democracy) emphasize selection by lot as a test of democracy, "The rule of the people has the fairest name of all, equality (isonomia), and does none of the things that a monarch does. The lot determines offices, power is held accountable, and deliberation is conducted in public." (Quoting Herodotus)
