I resent that absurd ad hominem ... you mischaracterize both my comments and the President's:
First, Bush never stated certain knowledge, he based his case on the intelligence and stated as such:
"The first time we may be completely certain he has a -- nuclear weapons is when, God forbids, he uses one. "
- George Bush, Sept 2002.
There were at least 5 reasons to go to war against Iraq. WMDs was but one of them:
"
If the Iraqi regime wishes peace, it will immediately and unconditionally forswear, disclose, and remove or destroy all weapons of mass destruction, long-range missiles, and all related material.
If the Iraqi regime wishes peace, it will immediately end all support for terrorism and act to suppress it, as all states are required to do by U.N. Security Council resolutions.
If the Iraqi regime wishes peace, it will cease persecution of its civilian population, including Shi'a, Sunnis, Kurds, Turkomans, and others, again as required by Security Council resolutions.
If the Iraqi regime wishes peace, it will release or account for all Gulf War personnel whose fate is still unknown. It will return the remains of any who are deceased, return stolen property, accept liability for losses resulting from the invasion of Kuwait, and fully cooperate with international efforts to resolve these issues, as required by Security Council resolutions.
If the Iraqi regime wishes peace, it will immediately end all illicit trade outside the oil-for-food program. It will accept U.N. administration of funds from that program, to ensure that the money is used fairly and promptly for the benefit of the Iraqi people. "
- Bush to UN general assembly, 12 sept 2002
Note the word STRATEGIC in the paragraph: "The United States has no quarrel with the Iraqi people; they've suffered too long in silent captivity. Liberty for the Iraqi people is a great moral cause, and a great strategic goal. The people of Iraq deserve it; the security of all nations requires it. Free societies do not intimidate through cruelty and conquest, and open societies do not threaten the world with mass murder. The United States supports political and economic liberty in a unified Iraq."
http://www.whitehouse.gov/news/releases/2002/09/20020912-1.html