Engineering
A design isn't a result until it's tested against a requirement.
What counts as evidence: A defined spec or requirement, a build or simulation, and measured performance against it.
- Write the requirements and success criteria before you build anything.
- Test under conditions that could make the design fail, not just the easy case.
- Document iterations — what you changed and why is often the most interesting part.
- Simulation (free tools like OpenFOAM, FreeCAD) is a legitimate substitute for a physical build.