The Elon Musk-backed OpenAI nonprofit created a "gym" for machine learning research

It's a long established tradition for startup founders to fudge their numbers, exaggerate projections, and cherrypick data in meetings with investors. But Venrock health investor Bob Kocher says this approach won't fly with him. "I hear spin every day. I believe I'm lied to more often in Silicon Valley than at the White House," says Kocher, who formerly worked as a special assistant to President Obama to help shape the Affordable Care Act. "I'm looking for entrepreneurs who will level with me."