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If a UI button is a programming language, it's a tiny, trivial one. But that lens of “In what ways is this user interface a form of programming?” does open the door to insights about what experiences humans are going to have trying to use it.

We programmers understand the difficulties and the dangers of:

- compounding complexity
- mismatch between mental model and machine implementation
- error states
- unintended consequences
- solving the problem at hand using the building blocks available