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

What's an example of a task that requires knowledge of physical objects to perform?
Remove blood stain from T-shirt.

What's an example of a task that requires knowledge of physical objects to perform?
How can I get rid of a migraine?

What's an example of a task that requires knowledge of physical objects to perform?
How do you clear water from a snorkel?