Code

Write the logic as an actual script or program. Unlike a checklist a person walks through or a spreadsheet you eyeball, code forces every rule to be stated exactly, reruns identically on new inputs, and can be checked against cases whose answers you already know.

Write the logic as an actual script or program. Unlike a checklist a person walks through or a spreadsheet you eyeball, code forces every rule to be stated exactly, reruns identically on new inputs, and can be checked against cases whose answers you already know.

Example

You write a 50-line Python script for the kitchen question: it takes income, spending, debt rates, and a renovation cost, then prints the savings balance month by month. You test it on last year's real numbers first, confirm it lands within $200 of your actual balance, then run 2027 scenarios.