Agricultural scientist: Wild apples are considerably smaller than cultivated apples found in supermarkets. In one particular region, archaeologists have looked for remains of cultivated apples dating from 5, 000 years ago, around the time people first started cultivating fruit. But the only remains of apples that archaeologists have found from this period are from fruits the same size as the wild apples native to the region. So apples were probably not cultivated in this region 5, 000 years ago. The agricultural scientist's argument is most vulnerable to criticism on the grounds that the argument ['uses a claim that presupposes the truth of its main conclusion as part of the justification for that conclusion', 'takes for granted that all apples are either the size of wild apples or the size of the cultivated apples now found in supermarkets', 'fails to consider that even if a plant was not cultivated in a given region at a specific time, it may have been cultivated in nearby regions at that time', 'fails to consider that plants that have been cultivated for only a short time may tend to resemble their wild counterparts much more closely than plants that have been cultivated for a long time']