“…(3, 1), (3,2), (2,3), (3,4), (4,7), (3,9), (3,10), (3,12), (2,17), (2,19), (4,21), (4,23) and other entries equal to '0'. By (17) we have K 13 (3,9) = K 13(2,35) = 1, K 23(4,36) = 1, K 33(3,13) = 1, K 53(4,51) = 1, K 63(4,52) = 1 with other entries equal to '0', which implies that K i3 are generalised logical matrices for i = 1, .…”