You start with a semantic graph of knowledge. Then people use the universal query interface to pick a node (abstract or concrete) from the graph. Then they re

You start with a semantic graph of knowledge. Then people use the universal query interface to pick a node (abstract or concrete) from the graph. Then they repeat the step above to pick another node from the graph. Once they have 2 nodes, they can pick an edge (relationship) that works between those two. There is your basic interaction, where people can communicate semantic statements. You can easily expand from there.