
In black and white
Physical Documents
Refers to information that is documented on paper, not spoken or digital.

I prefer having our agreement in black and white to avoid misunderstandings.
Proof of Agreement
Used when you want to confirm that something is formally recorded.

Once we sign this contract, our deal is in black and white.
Historical Context
Origins point to old times when writing was only in black ink on white paper.

Historically, seeing things in black and white meant having written proof.
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