Brad, Hotbot has been partnered with LexiQuest for quite a while, which if I'm not mistaken uses a technology to determine contextual validity in searches.
I'm assuming that this does the same. From the Intelliseek [cyc.com] site:
"powered by an immense multi-contextual knowledge base and an efficient inference engine. The knowledge base is built upon a core of over 1,000,000 hand-entered assertions (or "rules") designed to capture a large portion of what we normally consider consensus knowledge about the world."
Sounds like this would help in determining whether, for example, the word "string" is referring to what a package is tied with, or a string of text.