CONCEPT
Mature Researcher vs. Novice (Augmentation Dynamics)
Bush's memex presumed expert users augmenting existing capability; AI serves both experts and novices, producing asymmetric effects—extension for the former, substitution for the latter.
The memex was designed for mature researchers who already possessed domain expertise and needed enhanced navigation. AI augmentation operates differently across experience levels: experts use it to extend capabilities they have (faster literature review, broader synthesis, accelerated hypothesis testing), while novices use it to access capabilities they lack (performing analyses they don't understand, generating outputs they can't evaluate, entering professional domains without traditional training). This asymmetry produces the divergent experiences You On AI documents—senior developers who find AI liberating versus junior developers whose skill development is arrested. Bush's framework anticipated augmentation of the expert; it didn't anticipate substitution for the novice becoming economically attractive enough to reshape hiring, training, and professional development.
In The You On AI Field Guide
Bush assumed the memex user brought a "prepared mind"—Pasteur's phrase for the consciousness that recognizes significance when it appears. The expert researcher using the memex would know which trails to follow, which associations to preserve, which materials to synthesize. Their domain