From here (emphasis added)
This was known to be factually wrong at the time it was said. CIA /= most experts. In fact, only the CIA (and if this article is to be believed, one analyst at CIA in particular) thought that. Everyone else (State, DOE, and the national labs - as well as the IAEA) said they were not suitable for that purpose. Is the lie minor? Arguably. Is it a lie? Yes.
No, it becomes a lie after it has been debunked and is repeated as fact again. For example:
- Bush Admin - Iraq bought tubes for nuclear centrifuges. <-Not lie
- Preponderance of evidence - The tubes they bought aren’t usable for that.
- Bush - “Our intelligence sources tell us that he has attempted to purchase high-strength aluminum tubes suitable for nuclear weapons production.” <- Lie
Note on number 3 the lack of any qualifier regarding expert opinion. He stated it as fact and did so in January 2003 long after expert opinion had ruled otherwise. That makes it a lie.