A lawsuit that could affect how the customer-review site Yelp does business in the future is still alive, thanks to a Santa Clara County judge. The case involves a libel suit filed by a dentist who claims she was defamed in a negative review posted on Yelp. Although Yelp is technically no longer a part of the case, the online site could be significantly affected by it. If the dentist wins the case, it could scare people into no longer writing negative reviews, thereby harming the Yelp business model. Yelp users depend on reviews to get an honest assessment of restaurants and businesses.