Memetic drift affects words and meanings and thus definitions, thus to truly understand the other person, one must to borrow a phrase, understand where they are coming from. to understand their frames of reference. This would allow a better transfer of information, of meanings and of memes
memetic drift of language can also facilitate this notion of abstraction distance your ingroup can have its own similarities in abstractions so you come to similar conclusions ergo group think but to common plebs you have abstract distance why silicon valley has group think.
The problem of fuzzy definitions. As you can understand, mind and reality are hard to define, many have tried, many still try. Try to define a meme without referring to itself or strange loops. Definitions are changing, chaos increases, look how much our language has changed, & within our lifetimes, see there is an acceleration. Due to the increased memetic velocity of a new subtrate of memes that is social media, crowd dynamics are more non linear.