The only proof is prediction.

...simply because it is not over yet, and I do not believe anyone can truly predict what will happen in the next few weeks.
Well I can.

#1. Saddam will STILL not use nuke/chem/bio.

#2. US forces will take MORE hits as they fight through the cities.

#3. Within the next month, Saddam will be killed and the US will declare "victory".

#4. The fighting will continue in "isolated" incidents attributed to "terrorists".

The only proof is prediction.

Those who cannot make accurate predictions do NOT have a sufficient understanding of the situation.

Which results in the need for them to makes excuses when events do not unfold "correctly".