·
**The
Question:** Suppose that you have two buckets of sand, bucket A and bucket
B. Bucket A contains a certain volume of
pure white sand, and Bucket B contains exactly the same volume of pure black
sand. Now suppose you take a teaspoon of
sand from bucket A and pour it into bucket B, and stir bucket B thoroughly;
then take a teaspoon of sand from bucket B and pour it back into bucket A. After doing this, does bucket A have more
black sand, or does bucket B have more white sand? (i.e. which bucket has more impurities
in it)?

·
**Argument
I:** Both buckets end up with the same volume of sand that they started with,
and so the amount of white sand that was transferred from bucket A to bucket B
must match the amount of black sand which was transferred from bucket B to
bucket A. Thus both buckets contain the
same amount of impurities.

· For the countervailing argument, click here.