Which of the following is not logically equivalent to the proposition : ?A real number is either rational or irrational?.

If a number is not real, then it is neither rational nor irrational

If a number is neither rational nor irrational then it is not real

If a number is not a rational or not an irrational, then it is not real

If a number is real, then it is rational or irrational

Which of the following is not logically equivalent to the proposition

1.	Which of the following is not logically equivalent to the proposition : ?A real number is either rational or irrational?.
A.	If a number is neither rational nor irrational then it is not real
B.	If a number is not a rational or not an irrational, then it is not real
C.	If a number is not real, then it is neither rational nor irrational
D.	If a number is real, then it is rational or irrational
Answer» C. If a number is not real, then it is neither rational nor irrational

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Which of the following is not logically equivalent to the proposition : ?A real number is either rational or irrational?.

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