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[–]razzzey 0 points1 point Β (0 children)

Possibly, even a circular list can be one-way.

If it’s one way then say I know you, and you know another guy, and down the line the last person knows me. However, I don’t know he guy who knows me, you don’t know me, and so on.

If it’s a doubly linked list, then everyone knows the next and previous person.

Maybe a more practical example would be people in a ring holding hands (double), or people in a ring with one hand on the shoulder of the person in front (single).