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Old 05-31-2013, 08:25 PM
zenobia43 zenobia43 is offline
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Join Date: Mar 2012
Posts: 105
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That's it!

By substituting Della for the parrot, you get the relations described by shriekingviolet, and a puzzle that looked like it needed the what-if treatment becomes routine pure logic.

After the substitution, you have two inequalities with entities in the same category on one side and the same distance from the entities on the other side.

As long as the entities on the other side are in different categories, you get another X - hopefully a new one.
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