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7. Existence / D. Theories of Reality / 7. Facts / d. Negative facts

[whether denials and absences can be facts]

6 ideas
A positive and negative fact have the same constituents; their difference is primitive [Russell]
There can't be a negative of a complex, which is negated by its non-existence [Potter on Russell]
Facts can be both positive and negative [Wittgenstein, by Potter]
The world is determined by the facts, and there are no further facts [Wittgenstein]
The existence of atomic facts is a positive fact, their non-existence a negative fact [Wittgenstein]
On white paper a black spot is a positive fact and a white spot a negative fact [Wittgenstein]