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"I know for a fact" vs "There is no doubt in my mind"

Both phrases are correct and commonly used to express certainty or confidence in a statement. They convey a strong belief in the information being presented. The choice between them depends on personal preference or the desired level of emphasis.

Last Updated: March 15, 2024

I know for a fact

This phrase is correct and commonly used to express certainty or confidence in a statement.

This phrase is used to emphasize that the speaker is absolutely certain about the information they are providing.

Examples:

  • I know for a fact that she will be there.
  • He knows for a fact that the project will be successful.

Alternatives:

  • I am certain that
  • I am sure that
  • I am confident that
  • I am convinced that
  • I have no doubt that

There is no doubt in my mind

This phrase is correct and commonly used to express certainty or confidence in a statement.

This phrase is used to emphasize that the speaker is completely convinced and has no reservations about the information they are presenting.

Examples:

  • There is no doubt in my mind that he will succeed.
  • She said there is no doubt in her mind that the decision was the right one.

Alternatives:

  • I am absolutely certain that
  • I am completely convinced that
  • I have no doubt that
  • I am fully confident that
  • I am totally sure that

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