A confidential analysis of Internet search queries and a random sample of Web pages taken from Google and Microsoft's giant Internet indices showed that only about 1 percent of all Web pages contain sexually explicit material. The analysis was presented during a federal court hearing last week in Philadelphia in a suit brought by the American Civil Liberties Union against Attorney General Alberto Gonzales and obtained on Monday by the Mercury News. The ACLU said the analysis, by Philip B. Stark, a professor of statistics at the University of California, Berkeley, did not appear to substantially help the Department of...