| http://www.w3.org/ns/prov#value | - Luca, cash is essentially just an accounting device that measures the difference between goods and services produced, and goods and services consumed or owned. (This is an oversimplification, ignoring the effects of gifts, taxation, interest rates, theft, fraud, waste, and other forms of wealth transfer, creation, or destruction, but will suffice for now.) As a first approximation, the only way to
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