The question of whether Tesla CEO Elon Musk is a fraud or is just too careless with his words took center stage in a San Francisco court room Wednesday. Under the microscope was Musk’s notorious 2018 tweet that stated funding was “secured” to take Tesla private at a potential value of $420 per share. In a class-action lawsuit that’s already two days underway, Tesla shareholders who traded the company’s stock in the days after Musk’s tweet are suing the executive for billions of dollars in damages.