diff --git a/lectures/revealjs/07-documentation.adoc b/lectures/revealjs/07-documentation.adoc
index ae79ee5100cd21d3aba884b39d62fad6415ec6be..199f047e1d323dcf38c4d4af167c149f8eddfc65 100644
--- a/lectures/revealjs/07-documentation.adoc
+++ b/lectures/revealjs/07-documentation.adoc
@@ -29,6 +29,8 @@ IT1901 Fall 2019 - 7th Lecture
 - a way to ensure software quality
 - several levels of documentation
 
+[.smaller-60]
+Note: In IT1901 we also look if the documentation is original. You should not just copy paste the documentation from the examples and just rename things to match your project.  
 
 == Types of documentation
 
@@ -63,7 +65,7 @@ IT1901 Fall 2019 - 7th Lecture
 
 == Comments (1)
 
-- allow adding documentatio in close proximity with the code
+- allow adding documentation in close proximity with the code
 - they should not be a way to cope with bad naming or "special" assumptions in the code
 - the standardized comments such as JavaDoc allow  additional benefits such as code completion
 
@@ -137,6 +139,12 @@ https://www.markdownguide.org/basic-syntax
 
 https://gitlab.stud.idi.ntnu.no/help/user/markdown
 
+== Why text based documentation
+
+- it is easier to modify and we do not need any special editors
+- it can be versioned same way as the code
+- holding  documentation in the repository and updating it will allow consulting the repository contents with the correct documentation for that snapshot in time
+
 ++++
  <div id="footer" class="footer">
  	<div style="display:table-row;">