diff --git a/course-syllabus.md b/course-syllabus.md
index 8026db5..23f90e1 100755
--- a/course-syllabus.md
+++ b/course-syllabus.md
@@ -8,6 +8,11 @@ Course syllabus, Fall 2023
 Prof. Gilles Louppe<br>
 [g.louppe@uliege.be](mailto:g.louppe@uliege.be)
 
+???
+
+Q&A: ask me anything (during the course, on any topic, questions collected on a platform)
+Give examples more related to engineering and science. Focus on people rather than technology.
+
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 # Us
diff --git a/lecture0.md b/lecture0.md
index 8a7cd77..0abb6ba 100755
--- a/lecture0.md
+++ b/lecture0.md
@@ -11,6 +11,7 @@ Prof. Gilles Louppe<br>
 ???
 
 R: Check https://www.youtube.com/watch?v=pd0JmT6rYcI + https://t.co/FA8sYGSv3K
+R: Check https://x.com/rickyrobinett/status/1825581674870055189?t=1Zi0InWlpiuQ9p1USDmRvw&s=03
 
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