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 n 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 n 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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