diff --git a/mental context.md b/mental context.md
new file mode 100644
index 000000000..1e9c093cf
--- /dev/null
+++ b/mental context.md	
@@ -0,0 +1 @@
+- #pull [[mental]] [[context]]
diff --git a/mental contexts.md b/mental contexts.md
new file mode 100644
index 000000000..10b896481
--- /dev/null
+++ b/mental contexts.md	
@@ -0,0 +1,2 @@
+- an Agora is a repository of [[mental contexts]].
+- #pull [[mental context]]
diff --git a/~.md b/~.md
index 87ab7d37f..ac9ff8888 100644
--- a/~.md
+++ b/~.md
@@ -1 +1,6 @@
 - a [[tilde]].
+- an [[action]].
+  - in an Agora.
+  - designates mutual convergence leading to equivalence, at least in certain [[mental contexts]].
+    - [[x]] ~ [[X]]
+    - [[[marx]] ~ [[karl marx]]