In a recent article published in Body & Society, Nikolas Rose considers what he takes to be possible historical–ontological implications of recent developments in brain-decoding technologies. He argues that such technologies embody the premise that the brain is the real locus of mental states and processes, hence that a new materialist ontology of thought may be in the process of emerging through technological demonstration rather than through philosophical resolution. In this reply, I offer some reasons for being sceptical about such (...) claims. I argue that the ontology in question hardly amounts to anything particularly new, that technologies cannot demonstrate anything in these matters independently of philosophical inclinations of some kind and that it is at least an open issue whether the ontology in question can secure its claim to be a materialist ontology of thought. (shrink)