 The first act of the theatre performances is usually filled with a lecture on Cimrman's personality, followed by a theatrical play.The theory of externism is described in a monologue by a Cimrmanologist having a lecture on Jára Cimrman's significance in the field of philosophy in the first act of the theatre play "Akt" ("The Nude") by Zdeněk Svěrák, Ladislav Smoljak and Jiří Šebánek.This epistemological theory contradicts the traditional theory of solipsism.