1)Provokes reaction and thought beyond what is obvious.
2)Something that incites critical thought about itself through mundanity.
It can be invoked by using "something which operates outside the normal bounds of its medium." May also operate on the subconscious level.
I high concept thread on an internet forum may be titled: "This thread refers to itself in the third person."
Think about it.
The location of the authors is listed as "The Internet," which by itself is a simple statement of location, but it invokes questions of existence.