The annual rainfall averages twenty-three inches. That doesn’t mean that every year will be 23 inches. Weather is unpredictable so it might not rain at all or rain past the annual average. Then again it might just do that, rain twenty-three inches in the north valley of California.

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And your question is...?
Logicians might call this an inductively reasoned argument. More likely than not (although not certainly), the conclusion will hold true given the premises.