Even more importantly, if it must be used, "fueled" must be reserved for systems in which the spontaneous reaction is coupled to the process of interest such that this part of the network achieves non-equilibrium steady state; it is clearly inappropriate to use the term "fueled" self-assembly, if the aggregated state is not actually coupled to the "fuel-waste" reaction. Indeed, we note that we are not alone in thinking there are currently linguistic problems; Prins proposed 12 the terms "dissipative self-assembly" and "assembly under dissipative conditions" to differentiate materials whose assembly is coupled to the spontaneous process, and those that are influenced by the spontaneous process but not coupled to it (e.g., Figure and Figure , respectively). However, we reiterate that, in our view, the focus on dissipation is unhelpful.