A free 25-minute self-guided mini-course for adult educators, university students and curious learners. You can use MARCO KI or another AI tool for the exercises. Lesson 1: Ask a clear question without personal information, then change the audience and compare answers. Lesson 2: Ask a skeptical follow-up, request counterexamples, and identify uncertainty. Lesson 3: Check two factual statements against independent primary sources. A citation alone is not evidence of correctnes

Five free exercises to check AI answers critically. Artificial intelligence can help people learn, but its output may be incomplete or wrong. Use these exercises with any suitable tool. 1. Ask for an explanation. Rephrase the same question and compare the two answers for consistency. 2. Ask for counterexamples. Find out where the explanation might fail and whether uncertainty is acknowledged. 3. Verify sources yourself. Open original references and check authorship, dates and

A practical checklist for checking whether an AI answer is up to date, sourced and trustworthy enough for your next decision.