Can Rishonim Make Technical Mistakes About Factual Reality? Yes

Yet another powerful example here on כמין כי…

Beyond olives, mapping Israel, ovens, jumping elephants, the Doros Harishonim’s examples… Appears open-and-shut, but I didn’t verify for myself.

(Not going into any philosophy or other issues, just the question in the title. Of course, my real intention here is to rebut some of the enemies of Techeiles whose axiom is the opposite.)