@michael_nielsen There r some nice examples of use of 'ladder of abstraction' in this on implementing social policy http://ukcatalogue.oup.com/product/9780199841622.do …
The term "ladder of abstraction" was coined by S. I. Hayakawa, professor of English, & Repub Senator for California http://en.wikipedia.org/wiki/S._I._Hayakawa …
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