With the radical proposition of life on inclined planes—a theory known as the oblique function—French architect Claude Parent sought to free architecture of orthogonal form, renew its social relevance, and inspire people's interest in the built environment. Based on Igor Siddiqui’s recently published book Oblique Experiments: Claude Parent's Architectural Installations (1969-1975)(Applied Research and Design, 2025), this lecture explores the significance of a series of temporary interventions that Parent designed in an attempt to convert his theory into practice.Referred to as practicables, these interior installations incorporated oblique geometries, involved interdisciplinary collaboration, and made themselves at home in existing buildings, often inside French cultural centers known as maisons de la culture. Using rarely published archival materials and new drawings, the lecture brings attention to this series of architectural experiments with enduring intellectual and creative appeal. Moreover, it prompts design practitioners and students to imagine the radical potential of obliqueness in a range of contemporary practices—beyond the literal prospect of life on sloped floors. As such, the lecture builds upon Parent's work to imagine new forms of experimentation in architecture, design, and art