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It won't be complete in any sense.
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Oversampling, a.k.a. supersampling, refers to fetching more samples than you strictly need for a purpose, but can use for other reasons.
For example, you might want 10 temperature samples per second, but actually sample 1000 times per second and average every 100, to get a slightly stabler output value.
This is useful for a few different but related reasons.