Use and Understanding: A Structural Asymmetry Under Scaling

This paper argues that the gap between use and understanding is not merely a temporary epistemic deficit, but a structural feature of systems that becomes dynamically relevant under scaling. Systems can often be used successfully before they are fully understood. This is not because understanding is accidentally absent, but because successful use requires only locally sufficient conditions, whereas understanding requires access to relations that extend across multiple instances. From this difference, an asymmetry follows: use can precede understanding. However, this connection is not symmetric. Understanding directly enables new forms of use, while use contributes to understanding only indirectly through the generation of variation across instances. As a result, the expansion of use tends to increase the scale at which a system is operated.With increasing scale, additional conditions and relations become relevant that are not fully contained in previously observed instances. The asymmetry between use and understanding is therefore not eliminated, but structurally reproduced. As the space of possible configurations expands, use systematically outpaces the scope of available understanding.This leads to a structural distinction between stable and underdetermined operation. Use within the scope of an adequate understanding is comparatively stable, whereas use beyond that scope involves relations that are not fully captured and is therefore structurally risky. Risk, in this sense, does not imply necessary failure, but exposure to outcomes that are not fully secured by existing understanding.The paper thus reframes the problem of limited understanding. The central issue is not simply that knowledge is incomplete, but that the expansion of use systematically exceeds the relational structure that has been grasped. This suggests a shift in perspective: the task is not to eliminate the gap between use and understanding, but to operate under the condition that it is structurally reproduced under scaling.