diff --git a/agora pkg chapter.md b/agora pkg chapter.md
index 5d8a9fb53..1729b1e3c 100644
--- a/agora pkg chapter.md	
+++ b/agora pkg chapter.md	
@@ -315,10 +315,14 @@ An Agora tries to solve all of these based on social signals contributed to the
   - [[heterarchies]], as represented by [[agora trees]] and [[path/like/queries]], can be reinforced by the Agora as more users hint at them.
   - Hypothesis: this can do away with the need for fixed taxonomies or category systems, and the associated upkeep cost (and potentially gatekeeping) that comes with them.
 - [[equivalence classes]] 
+  - If [[x]] pulls [[y]] and [[y]] pulls [[x]], then [[x]] ~ [[y]], meaning [[x]] and [[y]] converge in some useful context. This is true in particular if more than one user has contributed these signals.
 - [[ranking]] 
+  - It is well known[^pagerank] that links provide a strong signal for relevant and notability in graph like systems. 
+  - #uprank is an explicit Agora Protocol action that takes a subnode or user and hints at an intent to rank them more highly than the current resource.
+  - #pull can be used 
 - [[filtering]]
 
-If users write that [[x]] pulls [[y]].
+[^pagerank]: TODO: find paper or good up to date reference.
 
 ## Collaborative world building
 - We seek to provision and maintain a distributed knowledge graph tailored specifically to the goal of solving problems: those of its users and society at large.