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Evans’ conception of ontological vagueness is presented critically, contrasting his ideas with Anna Maidens’ perspective. While Evans rejects ontological vagueness, Maidens argues that quantum particles are good candidates to be considered as vague objects.
It is argued that ontological vagueness thesis is not adequate and that quantum particles are not good candidates as Maidens suggests. Instead, vagueness is best understood as a semantic phenomenon. From this point of view, I suggest that the Russellian approach against ontological vagueness thesis offers better contention than Evans’ one.