2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/215765Getting an unbiased result is a remarkably long standing problem of collective observation/measurement. It is pointed out that quantum coin tossing can generate unbiased result defeating dishonesty.~2500 words. I chased the problem over many years. Now it is complete. This paper is dedicated to S. WisnerCryptography and Securitytext