What's an example of a task that requires knowledge of physical objects to perform?
How can I remove old finish and dirt from wood?

What's an example of a task that requires knowledge of physical objects to perform?
No can opener and a can of beans.

What's an example of a task that requires knowledge of physical objects to perform?
How can I re-use a piano bench that I am thinking about selling?

What's an example of a task that requires knowledge of physical objects to perform?
How to make a magazine rack.