as clear as black and white

Of the utmost clarity; clearly defined or differentiated; without any room for confusion, ambiguity, or discrepancy. Love isn't always as clear as black and white, you know. You have to accept that there are many gray areas in relationships. The case made by the government seems as clear as black and white: raise taxes to pay for public amenities. Look, it's as clear as black and white—either you want to work here and help our company grow, or you don't.