There's a whole class of factoids where it seems some people are unable to resist bringing it up even when the connection to the current discussion is quite ten

There's a whole class of factoids where it seems some people are unable to resist bringing it up even when the connection to the current discussion is quite tenuous, and a reactionary set of people who are unable to resist a stock reply to the mention (which varies depending on the topic, but generally it's an "actually" calling out some exception to the first statement). In reality, everyone has read both the factoid and the stock reply a million times. It would be interesting to document and track these. They are almost like little autonomous programs that run on people's consciousness, which I guess is a just a meme per the original definition.