In a circular economy, manufacturers design products to be reusable. For example, electrical devices are designed in such a way that they are easier to repair. Products and raw materials are also reused as much as possible. For example, by recycling plastic into pellets for making new plastic products.
For example: Eighteen-year-olds have the right to vote because it's legal for them to vote. This argument is circular because it goes right back to the beginning: Eighteen-year-olds have the right to vote because it's legal.