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Today's Idiom = "A Known Fact"
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A Known Fact ( a fact that everyone knows; it is known to be true by most people ... )

"A Known Fact"

A known fact is a fact that many people know to be true.

Example: "That guy is a gangster? Are you sure?" Reply: "Of course I'm sure. It's a known fact."

When you say that it is a known fact, you are saying that other people also know it to be true. You are not the only person to know the thing which is a known fact.

A known fact is is "known", meaning people know it, and it is "a fact", meaning it is true.

Example: "He used to be an actor? I didn't know that." Reply: "Sure. It is a known fact."

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