It's not because the quote is wrong but because he was dodging a question by providing a long non-answer, he was being asked about the lack of evidence Iraq was

It's not because the quote is wrong but because he was dodging a question by providing a long non-answer, he was being asked about the lack of evidence Iraq was selling WMD's to terrorist groups. Then they start a protracted war that killed hundreds of thousands based in these "unknown unknowns".