There's the alphabet in correct order with all the letters repeated three times.
I do not know which "error" you mean, but the consistency of the rows is spot-on. The sentences "around" are also correct, so i'm quite curious as to what is the error.
These answers are all wrong because the riddle was not written correctly. Here is the correct version:
Find the error. Its impossible!
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
W
X
Y
Z
Did you know that 80% of UCSD students could not find the error above?
The error is that the word "its" in "Its impossible!" is supposed to have an apostrophe and it does not. It does not say that the error is in the alphabet
"Find the error. It's impossible. Is not the question we were presented with. So logically we are looking at a different problem to the one you found had an answer.
The whole idea behind any question is:- "Can you find some reasoning that makes what follows have an answer".
The best answer was voted on! Meaning that the person who originally invented the puzzle had no intention of there being anything wrong. This means that any reasoning that says here is the error can be dismissed as the intention was for there to be nothing wrong.
Like all intelligence tests they tell you nothing about a persons ability to invent reasons but only tell you about a persons ability to invent the same or similar reasons as the person who invented the question.
So what is being said is that the answer that is being looked for is -"There is nothing wrong so the error is in the question" and if someone is able to invent a reasoning that says 'here is the error' that is the wrong answer because they did not get what was being looked for.
Conclusion:- there is no right or wrong answer to the "What is wrong?" question. What would be nice is to know if a person’s inventive reasoning is faulty"