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Source details Corbin, T., Dawson, P., & Liu, D. (2025). Talk is cheap: why structural assessment changes are needed for a time of GenAI.
Prompt injection is a technique in which instructions embedded in text cause an AI system to follow them as commands. In educational contexts it has appeared as an AI detection mechanism in assessment — which raises sharper questions about authorisation and trust than it might initially seem.
When educators embed hidden instructions in assessment materials to detect AI use, they import adversarial security thinking into educational relationships. This post examines what AI tripwires reveal about institutional assumptions (i.e. that assessment is about artifact authentication rather than learning measurement) and argues that this approach creates escalating countermeasure dynamics while only detecting carelessness, not genuine disengagement. The alternative requires rethinking what assessment is actually for in an era when artifact production has become trivially automatable.
Rich Sutton's 'Bitter Lesson' from AI research—that general methods leveraging computation outperform human-crafted knowledge—has a direct parallel in education. When AI can produce the kinds of artefacts that assessments have traditionally relied on, it exposes a fundamental problem we have long ignored: we were never really measuring learning, we were measuring the difficulty of producing certain artefacts. This post explores what the Bitter Lesson means for assessment design in health professions education, and why AI makes it impossible to continue pretending otherwise.