Two distinct inputs producing the same output is metamery. <a href="https:&#x2F;&#x2F;en.m.wikipedia.org&#x2F;wiki&#x2F;Metamerism_(color)" rel="nofollow">https:&#x2F;&#x2F;en.m.wikipedia.org&#x2F;wiki&#x2F;Metamerism_(color)</a>.<p>Without it, color printing and color televisions would be way harder to create.