25 October Case Updates How not to use AI in expert evidence 10. Report Writing, 15. Criticism and Complaints, 16. Maintaining your professional edge, Artificial Intelligence, AI, 09. Records Assessments and Site Visits In this US case, an expert in fiduciary services used Microsoft’s Copilot to cross-check calculations he used in expert evidence. He was unable to recall the prompts he used, state the sources Copilot relied on, or explain how the tool worked and arrived at its outputs. The judge provided some useful insight into the challenges with using AI in expert evidence.