Which step is wrong?
3712
Why $\sqrt{-1 \cdot {-1}} \neq \sqrt{-1}^2$?
158179
Birthday problem: why is this solution wrong?
79648
Found an error in my thesis
149064
Referee says the proof is wrong, but it is not, what to do?
76666
Why does the basic intuition fail here? What is the reason behind it?
35274
What is wrong with this substitution?
59912
What are "How to ... ?" questions (errors) called?
59193
What is the problem in the codes?
42812
"I'm not sure what the right way is"
17999
How to find out where an error occurs?
76038
Tell me where is mistake in anacron task?
56509
What is the correct way to think about this yet another balls/boxes problem?
143595
How to step through Python code to help debug issues?
94686
A bug I can't seem to spot, faulty logic?
51543
Bones moving wrong part of mesh?
46250
Fallacy limit problem - Where is the mistake?
15431
"A wrong answer" vs "the wrong answer"