"Amazon CEO Jeff Bezos said Wednesday he can't guarantee employees have never used sales data from individual third-party sellers to develop the company's own products" There's no way he could make that guarantee. How can you prove a negative? The best Amazon can do is have policies, logs and access controls and punish employees if they break those policies. And Bezos committed to doing that.
> How can you prove a negative? Answering “no” while under oath would be a good start.
Other CEOs gave truthful answers, which is ... out of 10s of thousands of data points, I can't give you a blanket yes or no without commiting perjury.