Lockean ideas (especially complex ones) are sometimes regarded as images, sometimes not, especially when Locke grants them logical structure. His two accounts of abstract ideas, Berkeley's attacks on them, and Hume's variant on one of those attacks is covered. How ideas relate to concepts in Locke's thought and his strong tendency to identify ideas with qualities is also described.
Keywords: abstract idea, Berkeley, concept, Hume, idea, image, Locke, quality