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) 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 show that a complete representation of attention is not possible, since it cannot faithfully represent streams of attention. In this way, the study supports one of the core aspects of AST, that the brain's representation of its own attention is necessarily incomplete .