The doctrines associated with the slogan that meaning is the mode of verification continued to develop in the last four decades of the twentieth century. While the exact formulation of the principle was itself controversial, the essential idea was to link semantic and epistemic concerns by letting the meaning of an expression be its role within an empirical epistemology. At the same time the fortunes of logical empiricism, the movement associated with verificationism, changed substantially as well. First, as philosophers who conspicuously did not identify themselves with logical empiricism moved to center stage, the movement as a separately identifiable phenomenon virtually ceased to exist. This did not dispose of verificationism, however, for often the later philosophers' views were strikingly similar to the logical empiricism that they supposedly replaced, just as the criticisms of logical empiricism were often pioneered by the logical empiricists themselves. The...