Meaning of the word "why not" in English

What does "why not" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

why not

US /waɪ nɑt/
UK /waɪ nɒt/
"why not" picture

Phrase

1.

used to suggest or agree to something

Example:
Let's go for a walk. Why not?
You want to try the new restaurant? Why not!
2.

used to ask for the reason why something is not happening or should not happen

Example:
You said you wouldn't go, but why not?
They decided not to implement the new policy. Why not?
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