Does Artificial Intelligence Make You Stupid? Cognitive Debt and a Three-Tier Framework for Sustainable Human-AI Collaboration

Abstract

Generative artificial intelligence now drafts our correspondence, condenses our reading, and solves our problems faster than we can articulate them. A growing body of evidence suggests, however, that the very tools that lift short-term output can quietly erode the cognitive capacities they appear to augment. This paper synthesizes four recent empirical studies-a randomized controlled trial of AI in high-school mathematics, a field experiment with elite management consultants, a classroom trial of an AI physics tutor, and a neurophysiological study of AIassisted writing-and argues that the headline question is badly posed. The decisive variable is not whether people use AI but how they use it. We adopt cognitive debt, a construct describing the trade of present convenience for future capability, as an organizing lens, and develop a threetier framework for cognitively sustainable use. Tier 1 delegates non-developmental tasks without guilt; Tier 2 protects domain expertise by deploying AI adversarially rather than substitutively; Tier 3 preserves the desirable difficulties on which durable learning depends. Each tier is grounded in established findings from cognitive psychology. We close with implications for individuals and organizations, and with the limitations of an evidence base that remains early and uneven.