diff --git a/lab2/lab-notes.md b/lab2/lab-notes.md
index fccb9e94eee0bcdee2cb2e6191ada427a79105ef..3abf55234417e45068e7f4172a28e5bfddda6657 100644
--- a/lab2/lab-notes.md
+++ b/lab2/lab-notes.md
@@ -134,6 +134,7 @@
 - _What are the practical approaches for reducing the expected new data error,
   according to the book?_
 
+   It is impossible to calculate $E _{new}$ but it can be estimated using various methods. It is therefore hard to minimize $E _{new}$, in some cases a better loss funtion can reduce $E _{new}$.
   [p. 65]
 
 - _What important aspect should be considered when selecting minibatches,