What's an example of a task that requires knowledge of physical objects to perform?
To make fence posts that aren't permanent.

What's an example of a task that requires knowledge of physical objects to perform?
air bubble

What's an example of a task that requires knowledge of physical objects to perform?
To avoid getting a bad hangover while drinking,

What's an example of a task that requires knowledge of physical objects to perform?
Prevent soot during campfire.