Wadler's Law

via Haskell's Wiki, Wadler's Law states that:

In any language design, the total time spent discussing a feature in this list is proportional to two raised to the power of its position.

0. Semantics
1. Syntax
2. Lexical syntax
3. Lexical syntax of comments

applies to enterprise architecture in general with the increasing order of actually quantified feature impact supported by data.