Final answer:
The person described is not "double jointed" as the term suggests, but likely has joint hypermobility, which involves having looser ligaments and a greater range of motion in the joints. This condition is sometimes mistaken for having extra joints because of the impressive flexibility it can confer.
Step-by-step explanation:
The term "GLIA" in the question seems to be a typographical error or irrelevant, so I will focus on the main concept presented, which is joint hypermobility. The type of person who would have a choice of a joint with a highly mobile range, often mistakenly referred to as being "double jointed," actually has a condition known as joint hypermobility. This condition is characterized by looser ligaments, allowing for a broader range of joint movement than what is typically experienced.
Joint hypermobility is not the same as being double jointed, a term that inaccurately suggests that someone has extra joints. Instead, those with joint hypermobility benefit from an increased flexibility due to their ligaments being more elastic. Despite the misconceptions, the feats of those with highly mobile joints can still be quite impressive to observe. It is essential to recognize that such mobility can vary greatly among individuals, and being highly flexible is not necessarily indicative of any health issues, though it can be associated with certain conditions in some cases.