Relatedly, I&#x27;ve always wondered how the commodities markets handle this sort of &quot;Goodhart-style&quot; problem: what counts as a tomato? When they started doing futures and forward contracts for tomatoes, everyone understood them to be &quot;that tasty thing&quot;.<p>But then the participants (as expected) game the system, doing the minimum necessary to deliver 5000 &quot;things that count as tomatoes&quot;.  And so the taste and nutrition drift.<p>Do they have some rigorous definition of when the tomato isn&#x27;t good enough?  Can you define it so that there isn&#x27;t this drift?