I cannot; I am supposed to be obscure and all.
Pitiful attempts at levity aside, I made the list of all usual uses of the " sign to support my claim about why Puke used them. I cannot be sure of why he did it of course, since I am not him. I think.
Since "cultural imperialism" was not a quotation of some kind or another, I made my claim that Puke considered the phrase as not being wholly accurate or adequate. Another such example would be "Why aren't your 'friends" helping you out?", if the speaker considers that you are wrong to call them friends.
*Grumbles* Why do I have the feeling the explanation is even more obtuse than my previous post? Next time, remind me to leave grammar aside.