Facebook has long bet that artificial intelligence can help it with the difficult task of moderating posts from its billions of users. Now its parent company is taking a step that could move it closer to that elusive goal: building its first supercomputer. Meta on Monday announced its new AI Research SuperCluster (RSC), a supercomputer meant to be used for AI research projects. The supercomputer, which has been in the works for two years, may eventually help Meta develop far more powerful AI software — potentially useful for tricky tasks such as spotting hate speech in posts.