 and use that to say that the population could have been, in some cases, as high as 17,000 to 20,000 people. In this study, the limitation is, of course, that not all the rock gardens are necessarily being used at the same time, and also they're not necessarily all being used in the same way. And then there's also the possibility that they're not growing a single crop, which we know they were growing more than just sweet potato in these rock gardens. The conclusions that we're drawing are really about