n. in contract law, the talents of a person which are unusual, special or unique and cannot be performed exactly the same by another. These can include the talents of an artist, an actor, a writer, or professional services. The value of personal services is greater than general labor, so woodcarving is personal service and carpentry is not. Therefore, if an actor contracts to perform in a movie and fails to show, he/she will be liable for damages based on the difficulty to replace him. An artist who contracts to paint a picture cannot send a substitute, since he/she was retained for his/her unique ability and product.