A more thorough explanation:

Definition: State of art refers to the level of scientific and technical knowledge that exists at a particular time. It is often used in the context of products liability to determine whether a product was manufactured using the best technology available at the time it was sold.

For example, if a car manufacturer is sued for producing a faulty airbag, the state of art at the time of manufacture would be considered to determine whether the manufacturer used the best available technology to produce the airbag.

The term "state of the art" is often used interchangeably with "state-of-the-art," which refers to something that is the most advanced or innovative in a particular field.

For example, a company may advertise their state-of-the-art technology in their new smartphone, meaning that it is the most advanced technology currently available in the smartphone market.