Linear color additivity rules were foundation of color science. There were three linear color additivity rules. The first rule is A + B = B + A. The second rule is if A = B then kA = kB. The third rule is if A = B and C = D then A + C = B + D. All those rules were valid in spatial domain of human color vision while my new visual illusions showed that the first rule, A + B = B + A, was broken in temporal domain while others remained.
