What's an example of a task that requires knowledge of physical objects to perform?
How to sew a hoop skirt easily on your own?

What's an example of a task that requires knowledge of physical objects to perform?
How to melt wax?

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

What's an example of a task that requires knowledge of physical objects to perform?
To make sure an envelope doesn't go through machine sorting.