Dilemmas is a “slightly modified version of the Tarner lectures which [Ryle] delivered in Trinity College, Cambridge, in the previous year. In it he demonstrated, in a number of diverse cases, how specialist and non-specialist accounts of what is in some sense the same subject matter may generate apparent conflicts in the speculative mind if the concepts concerned are allowed to become detached from the background of their working employment. The resolution of such conflicts then calls for the reimposition of ‘category-disciplines’ by the critical philosopher. In this way, for example, we are delivered from the threat of being forced by classical logic into fatalism, or by simple mathematics into Zeno’s paradox of Achilles and the tortoise, or by the discoveries of natural science into the repudiation of our common-sense picture of the world” (ODNB).
