Name:
Anonymous
2012-01-13 6:23
If you cant sense it, then it doesnt exist.
You cant see emptiness, therefore emptiness doesnt exist.
Name:
Anonymous
2012-01-13 12:28
Let A be a non-empty class of subsets of U (the universal set).
If A is a member of A, A' is also a member of A, since A is closed under the formation of complements.
A union A' = U, since A is also closed under finite unions
A intersection A' = 0, since A is also closed under finite intersections
Therefore it contains the universal set and the empty set.