English phrase from drama scenes

What Does "it has to be foolproof" Mean?

Learn what "it has to be foolproof" means, when people say it, and how to use it naturally in English.

Intermediate
Neutral
Firm
Explain

It'll have to be a bus, a truck, something big. It has to be foolproof. It can't go wrong.

It means the plan or method must not fail.

From Rosy Psycho, Episode 33

When do people say this?

Scene Context

Someone says the plan must be completely reliable.

Usage Scenario

Use this in planning, problem-solving, or business situations. It can sound demanding if you use it to pressure someone.

Better ways to say it

1
It has to be foolproof.
2
It needs to be foolproof.
3
We need a foolproof plan.

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