““In his excellent and extremely comprehensive text, Engestrom (1991) locates Vygotsky's ideas within a dialectic approach, which was undoubtedly the framework that Vygotsky himself was exploring but never had time to develop in detail. There is no doubt that Engestrom offers a very distinctive perspective on Vygotsky's approach to concept formation. At the same time, by making clear what is involved in thinking about concepts within the notoriously (and perhaps inevitably) slippery terms of dialectic logic, his account also suggests why, for all its evocative power as critique, the dialectical method is unable to fulfil its promise as a theory for generating new knowledge.””
