The philosophy of archaeology seeks to investigate the foundations, methods and implications of the discipline of archaeology in order to further understanding of the human past and present. Central questions include what is archaeology? What is the theoretical basis of archaeology? How should archaeology conceive of time? Why, and for who, is archaeology practiced. What is the nature and reality of the objects and processes of archaeological study? Analytic philosophy of archaeology investigates the logic behind concepts such as artefact, site, the archaeological record and archaeological cultures. These are just some examples of the metaphysical, aesthetic, epistemological, ethical and theoretical concerns at the heart of the practice of archaeology.