To pre-answer a few comments I often get:
You're wrong about X.
No, I'm not.
You're wrong about X, asshole.
No, I'm not. Fuck off.
I think you're wrong about X.
No, I'm not wrong, and I don't really care what you think; I care only about why you think it.
How dare you assert X?
Because I think it's true.
How dare you fail to mention X!?
I don't know about it, I don't think it's true, or I don't think it's relevant in this context.
You failed to justify X.
Yes, I know. Sometimes I speculate, sometimes I summarize. This is a blog, not an academic journal. If you want to know why I think something, you need but ask.
You didn't justify X, so I don't have to justify to you my vehement assertion that you're wrong.
No, you don't have to justify anything at all to me. Indeed, you don't have to post here at all to not justify your opinion to me, so don't.
You're right about X.
yay. I know. Do you have something to add?
Why do you think X?
You're wrong about X because of A, B, and C.
You failed to mention X, and it's important because of A, B, and C.
You're right about X, and it implies the surprising results of Y and Z.