diff --git a/.obsidian/workspace.json b/.obsidian/workspace.json
index 3cf84b5..3533a5a 100644
--- a/.obsidian/workspace.json
+++ b/.obsidian/workspace.json
@@ -34,10 +34,10 @@
               "type": "pdf",
               "state": {
                 "file": "Concurrent Systems/slides/class 3.pdf",
-                "page": 7,
-                "left": -27,
-                "top": 250,
-                "zoom": 0.5754156769596199
+                "page": 8,
+                "left": -26,
+                "top": 147,
+                "zoom": 0.57541567695962
               },
               "icon": "lucide-file-text",
               "title": "class 3"
diff --git a/Concurrent Systems/notes/3.md b/Concurrent Systems/notes/3.md
index 2ed1b0c..de04bcc 100644
--- a/Concurrent Systems/notes/3.md	
+++ b/Concurrent Systems/notes/3.md	
@@ -144,4 +144,5 @@ unlock(i) :=
 ```
 Se il ticket number è minore si ottiene l'accesso, se il ticket number è uguale, allora si vede il process ID minore.
 
-It is possible that while reading, other processes are writing their turn! So it's possible that I read something unpredictable!
\ No newline at end of file
+> It is possible that while reading, other processes are writing their turn! So it's possible that I read something unpredictable! We need to consider it in the proofs.
+