So the topic is posting off-topic, so to posting on-topic would be completely off-topic and posting off-topic is directly the topic. SO if we posted off-topic, then we would be on-topic, which given the current topic would mean we were actually off-topic. But to be off-topic in an off-topic thread would actually be off-off-topic which would mean we were on topic which is completely ludicrous! Until you realise that to be on-topic in a thread which is all about being off-topic would mean you were truly off-topic which means you have completed your objective of being off-topic. Except being off-topic is exactly the point so then you are 100% on topic after all.
So basically, there are 2 options:
A) You post off-topic. This means you have posted on-topic. Which means you have posted off-topic. Which in this thread is on-topic. See option B.
B) You post on-topic. The topic is "off-topic"-ness so you are off-topic. So you are clearly on-topic. Which once again means you are off-topic. See option A.
After you've escaped from that little paradox, lets look at the mathematical point of view:
on-topic = off-topic = on-topic = off-topic...
(on)topic = (off)topic
(on)topic = (off)topic
on = off
But that's not all, let's continue.
on - 2(off) = off - 2(off)
on - 2(off) + on = - (off) + on
2(on) - 2(off) = on - off
2(on - off) = 1(on - off)
2(on - off) = 1(on - off)
2 = 1
Seems difficult, but now lets return to our original identity:
on = off
(on)^2 = (off)^2
sqrt(-1)*((on)^2) = sqrt(-1)*((off)^2)
i(on)(on) = i(off)(off)
onion = offoffi
The results are obvious to see. Logic is broken. Maths is broken. Onions should be called "offoffis". In conclusion, you just lost the game.