It's been a while since I used a Rete rule engine, back in my days as math nerd at a mortgage bank (ooof we survived the 08 meltdown by the skin of our teeth) we used an internal fork of Drools and paired it with a merkle tree datasctructure to store lending decisions.... I knew blockchain was gonna be a thing when the genesis block referenced the bailout... I kick myself daily cause should've bought more bitcoin.
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