Q: Here is a goal: How can you tell if a letter is junk mail or not?

How would you accomplish this goal?

A: If it has no return address its probably a sales pitch.

Q: Here is a goal: Detect dampness in bed.

How would you accomplish this goal?

A: Put small hand mirror between sheets to detect steam and blur.

Q: Here is a goal: Make hot chocolate without powder.

How would you accomplish this goal?

A:
Microwave nutella and milk in a mug.