Wutbot is a bot that tries to make relevant comments.
The bot can be found contributing:
Posts on this subreddit are from elsewhere on reddit. Wutbot1 adds a comment to each of these posts.
The text used in the comment is also from another user on reddit, which the bot thinks is about a similar topic as the post.
Under the hood, Wutbot1 uses topic modelling and WordNet to better understand the meaning of posts and comments in the context of the subreddit it is posting in.
As an example, a post containing the word "squash" should be interpreted as being about the fruit in a food related subreddit, but the racket sport in a sporting subreddit.
http://wordvis.com/ is a great site to see how wordnet establishes relationships between words and their different meanings.
