The state Supreme Court has decided to keep same-sex marriage illegal in California in a long-awaited ruling upholding Proposition 8. The court voted 6-1. But the court also ruled that the 18,000 gay marriages performed last year are still valid. In other words, if you were among those who took advantage of last year’s window when same-sex nuptials were legal in California, then your marriage is still valid. If not, then the state can legally discriminate against you.