critical stance towards his sources, collected by traders and priests, naively accepting their veracity, and that Durkheim interpreted freely from dubious data. At the conceptual level, van Gennep pointed out Durkheim's tendency to press ethnography into a prefabricated theoretical scheme. Despite such critiques, Durkheim's work on religion has been widely praised for its theoretical insight and whose arguments and propositions, according to Robert Alun Jones, "have stimulated the interest and excitement of several generations of sociologists irrespective of theoretical 'school' or field of specialization." Sociology of knowledge While Durkheim's work deals with a number of subjects, including suicide, the family, social structures, and social institutions, a large part of his work deals with the sociology of knowledge. While publishing short articles on the subject earlier in his career, Durkheim's definitive statement concerning the sociology of knowledge comes in his 1912 magnum opus, The Elementary Forms of Religious Life. This book has as its goal not only the elucidation of the social origins and function of religion, but also the social origins and impact of society on language and logical thought. Durkheim worked largely out of a Kantian framework and sought to understand how the concepts and categories of logical thought could arise out of social life. He argued, for example, that the categories of space and time were not a priori. Rather, the category of space depends on a society's social grouping and geographical use of space, and a group's social rhythm that determines our understanding of time. In this Durkheim sought to combine elements of rationalism and empiricism, arguing that certain aspects of logical thought common to all humans did exist, but that they were products of collective life (thus contradicting the tabula rasa empiricist understanding whereby categories are acquired by individual experience alone), and that they were not universal a prioris (as Kant argued) since the content of the categories differed from society to society. Collective representations Another key elements to Durkheim's theory of knowledge outlined in Elementary Forms is the concept of ("collective representations"). are the symbols and images that come to represent the ideas, beliefs, and values elaborated by a collectivity and are not reducible to individual constituents. They can include words, slogans, ideas, or any number of material items that can serve as a symbol, such as a cross, a rock, a temple, a feather etc. As Durkheim elaborates, are created through intense social interaction