Question:
Goal: clamp

Which of the following methods is more reasonable for accomplishing this goal?
Answer:
can hold boards

Question:
Goal: How should I brush my teeth?

Which of the following methods is more reasonable for accomplishing this goal?
Answer:
Angle the toothbrush upwards when brushing, that way you'll clean under your gums.

Question:
Goal: how do you open a cabinet?

Which of the following methods is more reasonable for accomplishing this goal?
Answer:
pull the door open.