Know for a fact that meaning in English

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Definition

I know for a fact that (my mother is pregnant): I am completely sure that, I am certain that (my mother is pregnant) idiom
  • "Brian : We know for a fact that barking was heard in the vicinity of the copy machine at 7.15pm, just 3 minutes before Stink's body was discovered in the hallway!"
  • "I know for a fact that you were born and raised in Brooklyn, where English is spoken almost fluently."
  • "Brian : We know for a fact that barking was heard in the vicinity of the copy machine at 7.15 pm, just 3 minutes before Stink's body was discovered in the hallway!"

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