Geoff Ralston, well-known in the startup community for his years at Y Combinator, is back in the formal investing ring, he announced Thursday. His new fund is called Safe Artificial Intelligence Fund, or SAIF, which is both an explanation of its thesis and a play on words. Ralston is specifically looking for startups that “enhance AI safety, security, and responsible deployment,” as his fund’s website describes. He plans to write $100,000 checks as a safe, “pun intended,” he says, with a $10 mil...