Examples:

1. Parenting: if children gain their priorities and values from other people, whose children are they?

References:

1. A puzzle posed by the Greeks, first by Plutarch: Athenians wanted to maintain the ship of Theseus - famed for slaying the Minotaur - as tribute. As parts decayed, they were replaced until eventually all the part of the ship where replaced. Plutarch asked the question: is it still the Ship of Theseus?