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A direct exchange is a criss-crossing of anything that doesn't involve a monetary unit, be it material or immaterial. An indirect exchange involves a monetary unit, for the same final effect as the direct exchange.
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A direct exchange is a criss-crossing of anything that doesn't involve a monetary unit, be it material or immaterial. An indirect exchange involves a monetary unit, for the same final effect as the direct exchange.
A direct exchange means a crisscrossing of hearts? Is that what you meant?