When someone repeats an argument that has been proven false /badly argued many times before, but keeps repeating it in hopes of drowning out opposition or derailing a thread. Yet not disruptive enough to get banned on forums, as it wraps itself in non-hostile, nicely written sentences.
How exactly do moderators deal with this kind of behaviour?
Actually it’s quite funny, if you take a broad interpretation of sealioning that does not involve the internet, Ancient Athens sentenced Socrates to death for “sealioning” in 400BC lol.
Well, sealions do go barefoot, even in winter.