Unlike earlier work (e.g., Briscoe, 2002; Cangelosi and Parisi, 2002; Steels, 2012) , many recent simulations consider realistic visual input, for example, by playing referential games with real-life pictures (e.g., Jorge et al., 2016; <cite>Lazaridou et al., 2017</cite>; Havrylov and Titov, 2017; Lee et al., 2018; Evtimova et al., 2018) . This setup allows us to address the exciting issue of whether the needs of goal-directed communication will lead agents to associate visually-grounded conceptual representations to discrete symbols, developing naturallanguage-like word meanings.