Definition:Almost All/Set Theory/Uncountable
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Definition
Let $S$ be an uncountably infinite set.
Let $P: S \to \set {\text {true}, \text {false} }$ be a property of $S$ such that:
- $\set {s \in S: \neg \map P s}$
is countable (either finite or countably infinite).
Then $P$ holds for almost all of the elements of $S$.