That is not a typo. Sottish, not Scottish, meaning like a sot – stupid, possibly intoxicated.
Continuing with the uplifting topic of the world’s madness, Burton describes the various failings and hypocrisies of so-called “wise men.” He calls Pythagoras a half-wizard half-witch and that sort of thing, concluding: “If these men now, that held Zenodotus’ heart, Crates’ liver, Epictetus’ lanthorn, were so sottish, and had no more brains than so many beetles, what shall we think of the commonality? What of the rest?” And from there, “In this sense we are all fools” and “our whole course of life is but matter of laughter… What madness ghosts us all?”
So… that’s nice. I do like beetles though.