A critic is a professional who communicates an assessment and an opinion of various forms of creative works such as art, literature, music, cinema, theater, fashion, architecture and food. Critical judgments, whether derived from critical thinking or not, weigh up a range of factors, including an assessment of the extent to which the item under review achieves its purpose and its creator's intention and a knowledge of its context. They may also include a positive or negative personal response. Cultural critic Clement Greenberg wrote that a good critic excels through "insights into the evidence ... and by ... loyalty to the relevant"; poet and critic T.S. Eliot wrote "a critic must have a very highly developed sense of fact". Other characteristics of a good critic are articulateness, preferably having the ability to use language with a high level of appeal and skill. Sympathy, sensitivity and insight are important too. Form, style and medium are all considered by the critic. In architecture and food criticism, the item's function, value and cost may be added components.