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In contrast, our main result shows that for any metric space $(X,d)$ of positive dimension, there are uncountably many Borel subsets of $(X,d)$ that are pairwise incomparable with respect to continuous reducibility.\n  The reducibility that is given by the collection of continuous functions on a topological space $(X,\\tau)$ is called the \\emph{Wadge quasi-order} for $(X,\\tau)$. 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