This article builds on my previous article on Dirk H. Th. Vollenhoven (Ive 2015) and provides an overview of the development of the systematic philosophy of Herman Dooyeweerd. This article seeks to provide an overview of the key developments in the thinking of Dooyeweerd, both in the convergences arising from the conversation of the two brothers-in-law and long-term colleagues and in their divergences. Dooyeweerd and Vollenhoven worked within the tradition of Abraham Kuyper, the father of Reformational philosophy. The development of (...) their respective philosophical systematics has tended to be addressed separately. However, I argue that the close cooperation between the two philosophers was critical in the formulation of the philosophy of the cosmonomic Idea. The philosophical conversation between the two persisted, despite critical divergences, largely aired privately. Their respective insights remained a source of mutual stimulus and complementarity foundational for Reformational philosophy. (shrink)

Objectivity in the sciences is a much-touted yet problematic concept. It is sometimes held up as characterising scientific knowledge, yet operational definitions are diverse and call for such paradoxical genius as the ability to see without a perspective, to predict repeatability, to elicit nature’s own self-revelation, or to discern the structure of reality with inerrancy. Here we propose a positive and general definition of objectivity based on work in the Reformational philosophy tradition. We recognise a suite of relation-frames–ways in which (...) things function and relate to each other, which can be analytically distinguished in the process of conceptual abstraction. These relation-frames also ground the diverse aspects of scientific analysis within which relationships and properties may be abstracted from entities and systems. We argue that objectivity can be understood as characteristic of representations that attempt to portray a subject in an earlier relation-frame than that in which it characteristically functions. In short, objectivity is projection. This proposal is exemplified from mathematics and the natural sciences and some possible objections to it are considered, as well as its extension to the social sciences. (shrink)