The biggest difficulty for Brown, as tutor to a machine, hasn’t been making Watson know more but making it understand subtlety, especially slang. “As humans, we don’t realize just how ambiguous our communication is,” he says.
Case in point: Two years ago, Brown attempted to teach Watson the Urban Dictionary. The popular website contains definitions for terms ranging from Internet abbreviations like OMG, short for “Oh, my God,” to slang such as “hot mess.”
But Watson couldn’t distinguish between polite language and profanity — which the Urban Dictionary is full of. Watson picked up some bad habits from reading Wikipedia as well. In tests it even used the word “bullshit” in an answer to a researcher’s query.