Problem: Which of the following is equivalent to "If is true then is false."?
Answer Choices:
A. P is true or Q is false.
B. If is false then is true.
C. If is false then is true.
D. If Q is true then P is false.
E. If Q is true then P is true.
Solution:
Statement (D) is the contrapositive of the given one and the only one of the statements (A) through (E) equivalent to the given statement.