01
Start with the thesis
Name the single idea the talk or chapter is trying to make practical.
02
Use the demo as evidence
A demo should reveal cause and effect, not merely decorate the explanation.
03
Carry it forward
Translate the example into checks a reader can apply to a different interface or codebase.
Working rule
Make the next measurement cheaper than the next argument.
Keep a minimal reproduction close to the observation. Change one variable at a time, preserve the failing path, and prefer before-and-after evidence over a broad rewrite.