The term tacit knowing or "tacit knowledge" is attributed to Michael Polanyi in 1958 in "Personal Knowledge". In his later work "The Tacit Dimension" he made the assertion that "we can know more than we can tell." He states not only that there is knowledge that cannot be adequately articulated by verbal means, but also that all knowledge is rooted in tacit knowledge. While this concept made most of its impact on philosophy of science, education and knowledge management – all fields involving humans – for Polanyi it was also a means to show our evolutionary continuity with animals. Polanyi describes that many animals are creative, some even have mental representations, but they can possess tacit knowledge only, except for humans who developed the capability of articulation and therefore can transmit partially explicit knowledge. This relatively modest difference then turns into a big practical advantage, but there is no unexplained evolutionary gap.