Is Tacit Knowing an Uncertainty or an Answer to Science Education? –Michael Polanyi Revisited. HSIAO-YU CHEN Faculty Development & Instructional Resources Center, Fu-Jen Catholic University, Taipei County 24205, Taiwan. SUFEN CHEN Graduate School of Technological and Vocational Education, National Taiwan University of Science and Technology, Taipei 10607, Taiwan. Abstract: This paper aims at demonstrating the complicated role of tacit knowledge in science education. By Thomas Alva Edison’s story, we would like to show that not only is it impossible to separate tacit knowing process from the articulate analytical methods, but those methods will not be (mis)led towards the irrational, postmodern approach because of the inarticulateness in knowing process. Michael Polanyi argues that science knowledge is tacit knowledge, and it sounds reasonable. Scientists’ tacit knowing involves deeply in every single move of all the complicated process in a scientific approach, although it seems that none of the steps to work on the analysis of method is inarticulate. That is the reason why so many outstanding scientists need to guide graduates personally to do the experiments step by step in laboratories. What mentees would learn from the mentors would usher us into developing an initiative designed to enhance our understanding of how professionalism might be embedded in science education. The point is that, not how much explicit knowledge and technology we know, but we learn only if the knowledge and technology is attached to tacit knowledge that is ambiguous and often misunderstood. Polanyi argues that the act of knowing based on tacit knowing, connecting with a hidden real world, is the foundation of the nature and justification of scientific knowledge. However, it could be a problem that scientists completely break with the tradition, and adopt an irrational, post-modernism approach instead, as anything-goes attitude shown in Paul Karl Feyerabend’s writings. Polanyi might frame the words anything-goes in details. We attempt to use Edison’s story to exemplify one of the details. References Feyerabend, P., & Munévar, G.: 1991, Beyond Reason : Essays on the Philosophy of Paul Feyerabend, Kluwer Academic Publishers: Boston. Feyerabend, P., & Preston, J.: 1999, Knowledge, Science, and Relativism: 1960-1980, Cambridge University Press: New York. Feyerabend, P., Feigl, H., & Maxwell, G.: 1966, Mind, Matter, and Method, University of Minnesota Press: Minneapolis. Feyerabend, P.: 1981, Realism, Rationalism, and Scientific Method, Cambridge University Press: New York. Feyerabend, P.: 1993, Against Method (3rd ed.), Verso: London. Hargadon, A. & Sutton, I:1997. ‘Technology Brokering and Innovation in a Product Development Firm’. Administrative Science Quarterly 42(4), 716-49. Hofer, B., & Pintrich, P.: 2002, Personal Epistemology : The Psychology of Beliefs about Knowledge and Knowing. L. Erlbaum Associates: Mahwah, N.J.. Latour, B., & Woolgar, S.: 1986, Laboratory Life : The Construction of Scientific Facts. Princeton University Press: Princeton, N.J. Latour, B.: 1987, Science in Action: How to Follow Scientists and Engineers through Society. Harvard University Press: Cambridge, Mass. Polanyi, M.: 1997, Personal Knowledge : Towards a Post-Critical Philosophy, Routledge: London.