Michael Polanyi’s conceptions of tacit knowing and emergent being are used to correct a reductionism that developed from, or reacted against, the excesses of several Cartesian assumptions: (a) the method of universal doubt; (b) the emphasis on reductive analysis to unshakeable foundations, via connections between clear and distinct ideas; (c) the notion that what is real are the basic atomic substances out of which all else is composed; (d) a sharp body-mind substance dualism; and (e) the notion that the seat (...) of consciousness can be traced to a point in the human body. The reductivist project in biology began with the emphasis Descartes put on the body as a machine. Polanyi reappropriates the machine metaphor to demonstrate how mechanistic explanations are not fully reductive. He shows how an eliminative materialism that would reduce mind to brain is unwarranted if either an interlevel mechanistic reduction or an intralevel successional reduction is posited. (shrink)

This paper first queries what type of concept of emergence, if any, could be connected with the different chemical activities subsumed under the label ‘quantum chemistry’. In line with Roald Hoffmann, we propose a ‘rotation to research laboratory’ in order to point out how practitioners hold a molecular whole, its parts, and the surroundings together within their various methods when exploring chemical transformation. We then identify some requisite contents that a concept of emergence must incorporate in order to be coherent (...) from the standpoint of the scientific practices involved. In this respect, we finally propose a relational form of emergence which pays attention to the constitutive role of the modes of intervention and to the co-definition of the levels of organization. No metaphysical distinction between the higher and basic levels of organization is supposed, but only a plurality of modes of access. Moreover, these modes of access are not construed as mere ways of revealing intrinsic patterns of organization but, on the contrary, are considered to be active elements on which the constitution of those patterns depends. What is at stake in this paper is therefore not an ontological form of emergence but an agnostic one which fits what chemists do in their daily work. (shrink)