Rails Training

3+ hours...

docker, rvm, ruby, rails, [spring pg sass-rails uglifier turbolinks sdoc rspec capybara factory_girl], postgres, bash, wget, index.html

Not bad, but I need a better understanding of how `screen` works, so that I can have tab-completion in a Docker > Screen environment.

Operations #ondata

Analytical approach:
- consider data
- check known hypotheses
- propose probablistic value for truth of each hypothesis vs data
- establish dependency relations between propositions

[later: define what it means to create new hypotheses from scratch]