Stone tools and pottery fragments are two of the most common kinds of archaeological finds. A. Stone tools are the oldest known artifacts, predating the development of ceramics by about two million years. B. The styles of stone tools produced by prehistoric peoples are more reliable indicators of their society's social and economic structure than the styles of their ceramics. C. Some researchers believe that the figures and symbols found on pottery may have multiple meanings, but this has not yet been fully established. D. Archaeologists know how stone tools were made and can produce copies themselves, but it is often difficult to determine how any particular ancient tool was used. E. The earliest evidence of ceramic production comes from Africa, Asia, and Europe, where the development of specialized technologies made pots nearly indestructible. F. Because pottery had both practical and symbolic uses, it can tell researchers a lot about the diet, economy, and social structure of ancient societies.