Isolates

Look for the nodes hanging off the edge of your drawing with one weak tie or none. Nobody routes through them, so they vanish from every pairwise account, yet their disconnection is often what you actually need to explain or fix.

Look for the nodes hanging off the edge of your drawing with one weak tie or none. Nobody routes through them, so they vanish from every pairwise account, yet their disconnection is often what you actually need to explain or fix.

Example

In the friend-group sketch, Priya has one edge left: Dana invites her. She confides in nobody and organizes nothing. That is why she stopped showing up, and why the fix is two new ties to her, not another group text.