Cost-benefit analysis is a weighing-scale approach to making business decisions: all the pluses (the benefits) are put on one side of the balance and all the minuses (the costs) are put on the other. Whichever weighs the heavier wins.
However, since the story constantly points out Jon's conflict with his illegitimacy and Ned's strict code of honor, many fans have come up with a theory that actually explains who they think Jon's parents really are. Fans know the theory as R+L=J.. R+L=J would refer to Jon Snow (J) being the child of Rhaegar Targaryen (R) and Ned Stark's sister, Lyanna Stark (L) rather than Jon being the illegitimate child of Ned.
Kit Harington, Game of Thrones. Check out all the times Game of Thrones hinted at who Jon Snow's real parents are below: 1. Ned's refusal to call Jon his son, but confirming he has Stark blood. In Game of Thrones' second episode, Ned gives Jon a pep talk before he joins the Night's Watch.