Damaging the reputation of a person or a group of people by publishing or saying bad things about them that are not true. More specifically, saying words which amount to defamation is slander and defamation in other forms, such as printed words or images, is libel.

Any matter of fact that a party to a claim or action offers to provide to prove or disprove an issue in the case. The strongest type of evidence is that which provides direct proof of the truth of an assertion. At the other extreme is evidence that is merely consistent with an assertion but does not rule out other, contradictory assertions, and may be viewed as circumstantial evidence.

An attempt to settle a dispute with the help of a neutral third party where all parties are actively involved in the decision-making process. The individual who intervenes in order to help the other parties settle their dispute is called a mediator.

Sometimes known as a repudiatory breach, is a breach of an essential part of a contract that it permits the distressed party to terminate performance of the contract, in addition to entitling that party to sue for damages.