... The obvious way to avoid presumption is to engage deeply and continuously with potential beneficiaries -to understand what they want, what they are constrained by, what resources they have, what strengths they can build on, and what dreams they have for the future. Development engineers and, sometimes, their critics have therefore refined a host of approaches to the design of solutions informed by beneficiaries: participatory design (Schuler & Namioka, 1993), cooperative design (Bodker & King, 2018), co-design (David et al., 2013;Ramachandran et al., 2007), participatory action research (Kemmis, 2006;Kemmis & Wilkinson, 1998), community-based participatory design (Braa, 1996), ethnographic design (Blomberg et al., 2009), human-centered design (Putnam et al., 2016), user-centered design (Putnam et al., 2009), asset-based community development (Kretzmann & McKnight, 1996;Mathie & Cunningham, 2003), and so on. What underlies all such approaches is a respect for potential beneficiaries as people who deeply understand the problem context, who have their own creative talents, and whose buy-in is required for uptake, impact, and sustainability of the solution. ...