Complex sentence: I think (question), therefore I am (Cogito Ergo Sum), or to the slogan of the Royal Academy of the Sciences of London (founded 1661) "Do not believe the words of man" (Nullius in Verba).
Split into simpler sentences: I think (question), therefore I am (Cogito Ergo Sum). Or to the slogan of the Royal Academy of the Sciences of London (founded 1661) "Do not believe the words of man" (Nullius in Verba).