@theUg I meant to say, some questions ask people to explain the meaning of words or phrases or syntactic constructions in some particular context, and they can be answered by native speakers without any need for references.

Let us look at 2 questions, one is "what does "у лошади в зубах цыган" mean?" and "What did the author wanted to say by describing a picture in such a weird way?". You may need references to support your point of view with respect to the second question, but you can answer the first one without any references.