Before revision:  In this short note, we ask to what extent it is possible, in principle, for a mind (either human or machine-based) to have an attentionschema that is complete in the sense of being able to faithfully represent streams of attention . Using a simple  model and a mathematical argument based on classical topology, we describe some limits of the extent to which an attention schema could be complete .
After revision:  In this short note, we ask to what extent it is possible, in principle, for a mind (either human or machine-based) that incorporates attention, and that contains a representation of its own attention, can ever have a complete representation . Using a simple model and a mathematical argument based on classical topology, we describe some limits of the extent to which an attention schema could be complete .