CONCEPT
Augmentation vs. Replacement (Bush's Distinction)
Bush's foundational framework distinguishing tools that extend human capability (memex) from tools that displace human function—the ethical and practical divide that structures all subsequent human-AI discourse.
Bush designed the memex explicitly for augmentation—the machine would handle speed, volume, and mechanical retrieval while the human exercised judgment, direction, and creative synthesis. This was not merely a design preference but a philosophical commitment: Bush believed human cognition possessed irreplaceable qualities (associative leaping, contextual judgment, purposeful inquiry) that machines should support rather than supplant. The distinction maps directly onto contemporary debates about AI deployment: systems designed to amplify human capability versus systems designed to automate human workers out of existence. You On AI's central argument—that AI is an amplifier whose output quality depends on input quality—descends directly from Bush's augmentation framework.
In The You On AI Field Guide
Bush developed this distinction in reaction to the automation discourse of the 1940s, when industrial automation was displacing factory workers at scale. He saw clearly that automation's logic (replace the worker, capture the savings) and augmentation's logic (enhance the worker, expand the possible) led to incompatible futures. Bush advocated for augmentation not from technophobia