None of the statements are true as they are presented.
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"Money stays at the same value over time." - This is false because the value of money can fluctuate due to inflation and deflation.
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"Money does not provide a standard unit of measurement." - This is false because one of the primary functions of money is to act as a standard unit of measurement.
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"Money retains the same value permanently." - This is also false, as the value of money changes over time due to economic factors.
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"Money maintains purchasing power over time." - This is generally false because purchasing power can diminish over time due to inflation.
In summary, the correct interpretation of money is more nuanced and dynamic than the statements provided.