i beg to digress - You interrupt the conversation to say something that doesn’t

You interrupt the conversation to say something that doesn’t make sense, just because you think you’re smart.

I beg to digress, I think I’m smart, so I’m going to say this.

I beg to digress, I don’t know what I’m talking about, but I’m smart.

I beg to digress, I’m not going to stop talking, even if I’m wrong.