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“Emergence is where there are new powers of wholes in virtue of causal interactions among their parts;

demergence is where there are subsequent new powers of the parts in virtue of the causal action of the whole upon them."

From https://twitter.com/froehlichmarcel/status/945238779736059905?ref_src=twcamp%5Eshare%7Ctwsrc%5Eios%7Ctwgr%5Ecom.google.Gmail.ShareExtension

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