A brain may be observed merely by opening the skull, a procedure I've done a few times. But reasons are fictions, much like powdered unicorn horns. Sounds ok to me. All living things USE, not HAVE, faith each and every day. It's needed to survive.
Human testimony amounts to only human opinion equal to any other guess.
Of course that was not the point at all. There are no miracles because there are no laws. Each thing and each event is a miracle. It is quite within the realms of Science that the Bomb Explosion might proceed in only one direction and that said direction might be away from the butter. Equally, it's possible that near indestructible butter might exist.