However (and this can be proved mathematically), although such systems exist, none of them can be explicitly described.
There is no explicit way to explain these systems.
There are many people who have been able to describe such systems.
A man is cutting ingredients.
Several runners are running around a corner.
A man stands in his kitchen.
A dog is looking at the camera.
There is a group of people standing in a crowded street.
Carriers must travel down roads not typically on their route in rural areas to deliver mail.