Design research involving practice (i.e., practice-based and practice-led research) can be seen to offer a unique approach to knowledge production grounded in imagination and transformation. Yet, in spite of this apparent uniqueness, the approach largely lacks a justificatory epistemological narrative—a way of describing and qualifying its underlying theory of knowledge. It takes the view that any attempt to frame such a narrative requires deep philosophic engagement. This article aims to cohere the perspectives of three key philosophers—Dewey, Wittgenstein, and Heidegger—drawing their voices together around the coupled themes of experience-being, language-meaning, and knowing-truth and representing the whole in design terms.

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