[kokhanserhii]

By the way, my comment disappeared here. I thought it wasn't posted at level 4, so I moved it to the root. But it disappeared there too. I figured the moderators deleted it. Then I reread it- it was a poorly written comment, I agree. It was so ambiguous. I was referring about to the article and the most appropriate audience-first-year students who've studied mathematical logic. But if you take it personally, as some kind of innuendo, it could come across as some kind of inappropriate bragging or something like that. I apologize if anyone misunderstood what I meant.