A more thorough explanation:

Definition: Repetition refers to the act of demanding or taking back something that was paid or given by mistake. In legal terms, it is known as solutio indebiti.

Example: If a person accidentally pays their rent twice, they can demand repetition from their landlord to get the extra payment back.

Explanation: The example illustrates repetition as the person paid more than what was owed, and therefore, they have the right to demand the extra payment back. The concept of repetition is based on the principle that no one should benefit from a mistake or an error made by another person.