Adequate ideas are such as perfectly represent their archetypes. Simple ideas all adequate.
Modes are all adequate.
Modes, in reference to settled names, may be inadequate. Because then meant, in propriety of speech, to correspond to the ideas in some other mind. Ideas of substances, as referred to real essences, not adequate. Because men know not the real essences of substances. Ideas of substances, when regarded as collections of their qualities, are all inadequate.