[jackpark]

I wrote and defended a thesis proposal on this topic in which the goal was to automate, to the greatest degree possible, merging nodes which mean the same thing. One example is "CO2 causes climate change" and "Climate change is caused by carbon dioxide", both saying the same thing, but neither of which would submit to a simple string comparison. As it turns out, there are Watson-like agents beginning to emerge in the open source arena, including OpenSherlock, my project, which is taking forever to complete owing to the enormous amount of experimental work that must be accomplished.