— 488 —
The most doubful are the Names of very compounded mixed Modes and Substances.
      §20. Mixed Modes therefore, that are made up but of a few and
obvious simple Ideas, have usually names of no very uncertain
Signification. But the names of mixed Modes, which comprehend a
great number of simple Ideas, are commonly of a very doubtful, and
undetermined meaning, as has been shewn. The names of Sub-
stances, being annexed to Ideas, that are neither the real Essences,
nor exact Representations of the patterns they are referred to, are
liable yet to greater Imperfection and Uncertainty, especially when
we come to a philosophical use of them.
Locke Hum III, 9, §20, p. 488