(1) Looking at Figure 2B, it seems like humans (far right panel) still have a bit of the literal interpretation bias (more of a spike at exactly 1000 for “costs $1,000”) and a bit of the imprecise goal bias (more of a spike at 1001) than the full model does (next panel to the left). I wonder if this separates out by individuals — I could imagine some people being more literal than others (maybe due to natural variation, or because of an Asperger Syndrome type condition).
(2) Related to the above, the imprecise goal seems to be another communicative dimension, but it’s not talked about that way. Instead, we have “truth” vs. “affect”, and then imprecise goal gets folded into affect. I wonder why — perhaps because “imprecise goal” is a way to signal “this is not the truth”? If so, that would require fairly sophisticated communicative knowledge. On the other hand, Kao et al. (2014) treat it as completely separate in the Materials and Methods section — precision of goal (precise vs. imprecise) is fully crossed with communicative goal (truth vs. affect vs. both). So, it does start to feel like an additional communicative dimension.