Having limits is not a bad idea. It is the difference between faith and fact based opinions. There are natural phenomena responsible for the climate. When those phenomena cannot explain the observed change, you look for other causes.
Were sea level to fall and reverse the past trend, my opinion on agw would change. That is why my opinion is not faith based.
Unless you can state a parameter by which your opinion can change, then how can your opinion re agw not be faith based?
