T. Raja Rosenhagen

The observable/unobservable distinction, realistically construed, is a feature which lies at the very heart of van Fraassen’s constructive empiricism. The aim of this paper is to approach it by taking a close look at van Fraassen’s concept of observation. We will argue that if van Fraassen’s most recent writings about “literate experience”, especially his remarks on the status of observation reports and his general a-metaphysical stance, are taken into account, his realistic interpretation of the observable/unobservable distinction paves the road for inconsistency. In particular, we will show that a dilemma emerges to the effect that van Fraassen is forced to accept skeptical consequences blatantly at odds with constructive empiricism and its restatement of the aim of science. We will finally suggest that the only way out for van Fraassen involves giving up his realistic construal of observability and thus taking sides with constructivism.