 In the work of Locke and other empiricists, we also see precursors of certain contemporary anti-realist or reductivist accounts on which determinable attributions either indeterminately refer to determinate properties (as Berkeley [1710] suggests, more generally, for ‘abstract’ terms), or on which determinable attributions are (merely) ways of classifying determinates. Prior’s description of Locke’s view might be seen as compatible with either approach: 