Q: Here is a goal: how do you cover a window up?

How would you accomplish this goal?

A: put a curtain on the rod over the window.

Q: Here is a goal: metal bucket

How would you accomplish this goal?

A: can be poked with a thumb tack

Q: Here is a goal: What is a safe blade to use in a decorative guillotine?

How would you accomplish this goal?

A:
A plastic or wood blade would be safe.