82. An abstract idea may be a simple one.
83. How then is science of nature possible?
84. No ‘uniformities of phenomena’ can be known.
85. Locke not aware of the full effect of his own doctrine …
86. … which is to make the real an abstract residuum of consciousness.
87. Ground of distinction between actual sensation and ideas in the mind is itself a thing of the mind.
88. Two meanings of real essence.
89. According to one, it is a collection of ideas as qualities of a thing:
90. … about real essence in this sense there may be general knowledge.
91. But such real essence a creature of thought.