Experiment of December 15, 2016:
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How many books will Ms. Santa need until no part of the top book remains directly over the table?
A) After the second book, it is already the case that no part hangs directly over the table.
B) She needs three books until no part of the top book hangs directly over the table.
C) She needs around five to six books until no part of the top book hangs directly over the table.
D) This does not work at all, because she would need an infinite number of books.