Since the distinction between internal and external information is neuronal activity, i.e. the exact kind of information that an oscillation/thought can process, it can notice this distinction and thereby notice itself.

• This can be provoked deliberately by directing attention on attention itself.
• This noticing of itself is again “normal” neuronal information processing, i.e. the way neurons process anything, regardless of consciousness.
• It is necessarily processed in the rhythmic activities that transmit internal information.
• It is therefore self-referential and recursive: It notices something that is noticing itself, i.e. noticing something that is noticing something that is noticing itself, i.e. noticing something that is noticing something that is noticing something that is noticing itself etc.