https://arstechnica.com/tech-policy/2021/12/despite-mountain-of-evidence-elizabeth-holmes-claims-to-remember-things-differently/

In Elizabeth Holmes’ sixth day on the stand, the prosecution sought to undermine her previous testimony one piece of evidence at a time.

On the stand, Holmes admitted to some mistakes. For other mistakes, she placed the blame on her colleagues. And in many cases, she simply couldn’t recall what had happened. The prosecution, though, had plenty of testimony, emails, and documents to refresh her memory.