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I wonder where we're going with all this stuff? It really does sound like science fiction.
This especially:
"Two molecules like this could communicate with each other and form more complex assemblies. So we hope we can challenge them with certain tasks and then see how they would come together to fulfil that task.
"We could have a simple predator-prey system in which one of them would try to cleave the legs of the other."
It is a proposal that sounds like a sub-microscopic robot war.