“…But this perspective has also produced insights for considering knowledge in the context of planning systems. Studies have, for instance, examined knowledge in environmental policy (Collins, Cowell, & Flynn, 2009;Cowell & Lennon, 2014;Dunlop, 2014), spatial planning (van Broekhoven et al, 2015), and energy infrastructure decisions (Aitken, 2009;Kerr et al, 2014). In these politicised contexts, the focus is on occasions of conflict and contestation, because knowledge in planning contexts is rarely unitary or certain (Alexander, 2008;Rydin, 2007).…”