As Elizabeth Holmes’ fraud trial gets underway this week, lawyers for the former Silicon Valley entrepreneur may try to show she was a true believer in the blood-testing technology at her startup Theranos Inc, and never intended to defraud investors and patients, legal experts said. On Wednesday, federal jurors in San Jose, California will hear opening arguments in the case against the Stanford University dropout who once dazzled Silicon Valley and is now charged with misleading investors and patients by falsely claiming that the company’s printer-sized devices could run a range of tests and produce accurate results using a single drop of blood. To defeat the charges, Holmes’ attorneys are likely to home in on what she herself believed about the complex science, according to several defense attorneys. “The best way to argue a defense in a science-based case is to suggest that this young woman had a good faith …