diff --git a/IDEAS b/IDEAS
index a5c7414..780a8e7 100644
--- a/IDEAS
+++ b/IDEAS
@@ -1,3 +1 @@
-smart pointer / unique_ptr / shared_ptr
-static_cast
 traits: https://www.kuro5hin.org/?op=displaystory&sid=2001/3/1/72020/17594