Turning the Instruments Toward Relations

Abstract

Imagine turning Herschel's telescope and Leeuwenhoek's microscope away from the objects they make visible and towards the relations among them. What must an investigation observe, measure and compare to make a biological claim about those relations? This paper develops relational observability as an epistemology of the passage from observation to inference. Investigating a relation may require new observations: spatially registering cells, tracing a source's access to a recipient, or aligning measurements in time. In other cases, the observations already exist, but reorganising the data makes a new comparison possible. I distinguish these as acquisition gain and representation gain. The same data may support a relational measurement, an estimate of dependence or an organisational inference, with different warrants. Combining measurements into an organisational composite raises the question of which differences the combination preserves. In microbial source relations, regional occurrence must be distinguished from recipient-specific access, establishment and effective contribution. For a spatial measure at an epithelial interface to support a prospective claim about directed dependence, temporal order, variable roles and relevant alternatives must be specified. Relations unfold over time. Sequence, duration, recurrence and prior encounters matter when they alter access, response or continuity. Relational history asks how different pasts bear on present organisation or capacity. When the formation and maintenance of continuity themselves require explanation, the analysis opens onto individuation. Relational observability asks which relational differences measurement and data organisation make distinguishable, what comparisons those distinctions make possible, and what inferences the resulting evidence can support.