Conceptual engineering projects are sometimes criticized for ‘changing the subject’. In this paper, I first discuss three strategies that have been proposed to address the change of subject objection. I notice that these strategies fail in similar ways: they all deploy a ‘loose’ notion of subject matter, while the objector can always reply deploying a ‘strict’ notion. Based on this, I then argue that at least current formulations of the change of subject objection (together with the response strategies just mentioned), (...) create an overall defective dialectic, whereby no progress can be made on either side. After considering how such defective dialectic could be (at least partly) fixed, it is concluded that current formulations of the change of subject objection may be dismissed on dialectical grounds, even though some practical lessons may still be retained from the objection. (shrink)

This paper consists of two parts. In the first part, I will introduce a philosophical toolbox that I call ‘conceptual scaffolding,’ which helps to reflect holistically on phenomena and concepts. I situate this framework within the landscape of conceptual analysis and conceptual engineering, exemplified by the debate about the concept of disease. Within the framework of conceptual scaffolding, I develop the main idea of the paper, which is ‘the binocular model of plural medicine’, a holistic framework for analyzing medical concepts (...) and phenomena. In the second part, I demonstrate the use and value of the binocular model by analyzing, through the lenses of the model, the phenomenon of health wearable devices and their effects on the concept of diagnosis. (shrink)