Question 151943
Why is the set of natural numbers an infinite set but the set of blades of grass outside your yard a finite set?
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You can count the number of blades of grass and there will not
be any that are uncounted.
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If you try to count the natural numbers you may arrive at 
what you call the "last number"; but there is always a number
one greater than that "last number", and another number 
one greater than than, and another number one greater than 
that, forever.
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cheers,
Stan H.