Spirit Link

A Spirit Link is the purported spiritual link between two individuals, which is said to allow the pair to share thoughts, memories or information.

Subscribers to the Spirit Links theory believe that the Fox family has a number of links, especially Jack and Anna, supposedly Anna has witness the memories Jack held while in Fury, including memories of her parents and grandparents. It is also said that Jack first flew a plane by using information passed down to him by his grandfather (whom he never met), and Anna did the same with sailing a boat using Jack's knowledge.