Students who use AI to solve STEM problem sets can evade detection, but they skip the mental work that builds understanding, says chemistry tutor Kelvin Ang. SINGAPORE: During last year’s exam season, a student showed me her answer to the 2024 GCE A-Level Chemistry Paper 3 question. The task was straightforward: Draw three curly arrows to complete a reaction mechanism. ChatGPT provided a diagram with clean lines, proper notation, and technical precision. But the arrows were completely wrong,