Arguing with giants

Sometimes I love to read blogs by professors and educated people on the web. It's stimulating. Sometimes I feel like a real dummy in trying to respond to them, though. I don't have an education. Once upon a long time ago, I used to be smart. But, I think ya lose some of that as the years go by, if you don't use it continually. I don't know if my thoughts and ideas have any merit or worth. I just throw them out here like I'm so sure of everything. Then sometimes later, I think what am I doing arguing with this giant, or that kid in school who sounds like he knows twice as much as I do?