Vincent Cuypers

Scientific activities strongly depend on concepts and classifications to represent the world in an orderly and workable manner. This creates a trade-off. On the one hand, it is important to leave space for conceptual and classificatory criticism. On the other hand, agreement on which concepts and classifications to use, is often crucial for communication and the integration of research and ideas. In this paper, we show that this trade-off can sometimes be best resolved through conceptual governance, in which scientific institutions set a collective conceptual standard, and that voting can be a reasonable way to implement that governance. Voting is a means to simultaneously aggregate among conflicting values, preferences and priorities that often underpin conceptual or classificatory debates, all while signaling ongoing disagreement. We also discuss how the legitimacy of the voting process and its outcome can be ensured.

Human interaction with the living world, in science and beyond, always involves classification. While it has been a long-standing scientific goal to produce a single all-purpose taxonomy of life to cater for this need, classificatory practice is often subject to confusion and disagreement, and many philosophers have advocated forms of classificatory pluralism. This entails that multiple classifications should be allowed to coexist, and that whichever classification is best, is context-dependent. In this paper, we discuss some practical consequences of classificatory pluralism, in particular with regard to how one is supposed to find the best classification for a given context. We do so by means of a case study concerning oaks, in particular the pedunculate oak (_Quercus robur_ L.) and the sessile oak (_Quercus petraea_ (Matt.) Liebl.), two important putative species that present several classificatory challenges; and by applying one recent philosophical framework conceptualizing classification, the so-called Grounded Functionality Account (GFA) of (natural) kinds. We show how the GFA elucidates several issues related to oak classification and gives directions to optimize classificatory practices, and discuss some implications for scientific taxonomy.