Tools for thought should amplify fundamental capabilities

Improvements in fundamental human capabilities readily reverberate across the entirety of human capability. In light of this, Douglas Engelbart advocated that the development of tools for thought should focus on the basics, resulting in a multiplexer-like amplification. How can the basic human skills be amplified, optimized, and augmented? This view is also consonant with the second brain framework for cognitive augmentation, as it enables the engineer to focus on independent fundamental functions.