If you say that a situation is black and white,the meaning is black and white,and it is easy to distinguish between wrong and right.
I'm really sure about some things.I think free education for all is a black and white issue.
The question of nuclear power isn't black and white.Many people believe it is the only way to produce a large amount of clean energy-but many others think it has considerable dangers.
The phrase in black and white means black on white paper and is often used to describe something written down for record.
I couldn't believe I had won the lottery,but when I checked my bank statement there it was in black and white:one million dollars!