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Try to keep minimal "cognitive load" at all times.
* Minimize "symbol density"
I.e. the number of symbols in a function body required to do some
specific task.
This *excludes* things that decrease cognitive load, such as:
types, pre-conditions, assertions, etc.
* Minimize states
* Minimize "control-flow state" and control-statement nesting
This is basically the number of bblocks.
This can be done by transforming:
- trivial loops into trivial functional expressions
- nested blocks into non-nested blocks, e.g.
`if A; B; end` into e.g. `only A; B`
* Minimize possible states per line.
- Avoid boolean variables, use control flow instead.
- Avoid mutability
- Use `given` to avoid introducing variables
* Prefer local context over global context
- Use `given` "statement prefixes" rather than extra variables
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