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MathNet 2014 Question 59

Math Olympiad Vault · MathNet 2014

Question 59

The Xantians are the inhabitants, possibly infinitely many, of planet Xanta. They can feel love and respect towards themselves and one another. It has been observed that:
- Each Xantian loves exactly one Xantian and respects exactly one Xantian.
- If $A$ loves $B$, every Xantian who respects $A$ also loves $B$.
- If $A$ respects $B$, every Xantian who loves $A$ also respects $B$.
- Every Xantian is loved by at least one Xantian.
Is it true that each Xantian respects the Xantian whom they love?