"It" is whatever the topic of the day is. Whatever anyone is ever talking about, on any subject, in any weather. When there is a right or left, and up or down, or...whatever...you disagree with me by agreeing with whomever I am in dialog with. I could in fact go back and cut and paste text from some of your own posts, and you would come on and agree with the person who contests it, except that there is no text from your past posts to cut from because all you ever do is say, "I agree, I agree, I agree..." all over the place with whomever it might be that is disagreeing with me. It doesn't matter what we are talking about either. You usually come on after the posts of Meredith, Pat, and Melissa because they are usually the ones I am debating.
In this case "IT" is what I was trying to discuss with Meredith that Melissa agreed with. See, I said that neither of you even knew what he and I had been talking about, you just wanted to be contentious. Why don't you find out what the subject is before you start making speeches.