diff --git a/simulation.md b/simulation.md
index 8780d7eb6..3ebea8c69 100644
--- a/simulation.md
+++ b/simulation.md
@@ -2,4 +2,5 @@
 
 - a [[thing]].
   - [[computational]] [[process]]
+  - [[pull]] [[david deutsch]] [[max tegmark]] [[nick bostrom]] [[dust universe theory]]
 
diff --git a/singularity.md b/singularity.md
index d3f34b52b..24bd43eef 100644
--- a/singularity.md
+++ b/singularity.md
@@ -1,5 +1,6 @@
 # singularity
 
 - a [[thing]].
-  - [[pull]] [[divergence]] [[event horizon]] [[church of the singularity]]
+  - [[pull]] [[divergence]] [[event horizon]] [[church of the singularity]] [[simulation]]
+