theorem :: FACIRC_1:81

for x, y, c being non pair object
for s being State of (MajorityCirc (x,y,c))
for a2, a3 being Element of BOOLEAN st a2 = s . y & a3 = s . c holds
(Following (s,2)) . [<*y,c*>,'&'] = a2 '&' a3