Since 1990, many creative disciplines, such as art, design and performance, have engaged increasingly with academic research. Accompanying this has been a good deal of interest in ways to employ their professional and creative practices as instruments of inquiry, just as previous disciplines have developed research methods that employ their specialist skills and knowledge. This raises questions about how research in the creative disciplines might contribute to knowledge and understanding. Research and practice in these fields may deal with matter that changes meaning with time or context, especially in art, where audiences may be expected to complete the meaning of creative works for themselves. This paper offers an oversight of these issues. It sets out some examples from the wider community that illustrate how incomplete or tacit contributions to inquiry can be a valuable and sometimes necessary part of the enterprise of creating knowledge, establishing a research model that is relevant in many areas, especially where disciplines collaborate. It goes on to set out tentative principles for such contributions.</p