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The sense of values we have,
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the things that we get excited about are different,
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and the problems may be more difficult.
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But I want to start in every example,
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in every situation that I explain to you,
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with the simplest example, and slowly add on things.
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So, what we are going to study now
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is a non-living object
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and we're going to pick it to be a mathematical point.
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So the object is a mathematical point.
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It has no size.
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If you rotate it, you won't know.