Caleb suggests an alternative proof to Claim 2.1.4: "Take A = {1, 2, 3, ..., 100}, B = {50, 51, 52, 53,... , 200} and suppose that the universal set is N Then (AU B)° = {1,2,3, ..., 200}° = {201, 202, 203, ...} and %3D A° N B = {101, 102, 103, ...} n {201, 202, 203...} {201, 202, 203, ...}.We see that (AUB) = A°N B, as needed." What is wrong with Caleb's solution?" O To obtain a complete proof, Caleb should have done a few more examples. O Caleb computed the set (A U B)° incorrectly. O Caleb did not draw a Venn diagram. O Examples cannot be used to prove a general set identity. O Caleb computed the set A N B incorrectly.

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