 A different kind of antireductionism addresses a more conceptual dimension, the problem of categorial reduction: Meta-theoretical categories of description and interpretation for mathematical formalisms, e.g., criteria of causality, may block full reduction. Basic interpretative concepts that are not just variables in a theory or model are not reducible to counterparts in fundamental descriptions (Cat 2000 and 2006; the case of individuality in quantum physics has been discussed in Healey 1991; Redhead and Teller 1991 and Auyang 1995; in psychology in Block 2003).