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A yellow chair isn't in the set of chairs because it's yellow.
Similarly, a beautiful painting isn't in the set of good paintings because it's beautiful.
Is my analogy sound?

A yellow chair isn't in the set of chairs because it's yellow.
Similarly, a beautiful painting isn't in the set of good paintings because it's beautiful.
Is my analogy sound?

Response from Stephen Maitzen on :

Almost! You began with "A yellow chair isn't in the set of chairs because it's yellow [but rather because it's a chair]." So I was expecting "A beautiful painting isn't in the set of paintings because it's beautiful [but rather because it's a painting]." Your insertion of "good" spoiled the analogy.