Jeff Revesz is the founder of Adaptive Semantics, a company that uses semantic technologies to evaluate user comments to online postings. The company's largest customer, the Huffington Post, uses the company's product Julia, to evaluate 90,000 comments each day, and identify which may be abusive.

- Machine learning is based on the evaluation of editors, but normalizes the evaluations across the publication.

- A version of Julia (currently in testing) is available for use by bloggers to moderate comments on their own blogs.

- Semantic drift, the tendency of meaning and acceptance to change over time, is part of the ongoing update process to keep up with social norms.

Listen to my interview with Jeff.