“Did Rudolph go to a regular school?”/“No, he was elf taught.”

A Christmas riddle about Rudolph the Red-Nosed Reindeer is:
 
Q: Did Rudolph go to a regular school?
A: No, he was elf taught.
 
“Question: Did Rudolph go to a regular school?: Answer: No. He was ‘Elf’ taught” was posted on Twitter on December 5, 2008. An “elf-taught” joke about a reindeer named Olive (“Olive the other reindeer,” for “all of the other reindeer,” is a popular pun) was cited in print in December 2001, but was probably not known to the author of the Rudolph riddle seven years later.
 
         
20 December 2001, Evening News (Edinburgh, Scotland), “Venison for lunch or the reindeer’s in trouble,” pg. 9:
He joked: “This is getting serious. It is very sad that this has happened to Olive (The Reindeer—ed.)  at Uphall Primary as this is the first school she has been in - previously she was elf-taught.”
 
Twitter
Bluffton Today‏
@BlufftonToday
BT Blogs Question: Did Rudolph go to a regular school?: Answer: No. He was ‘Elf’ taught.
.. http://tinyurl.com/6zwxuy
4:16 PM - 5 Dec 2008
     
The Scotsman
Top jokes to cheer you up
Published: 08:54 Updated: 13:39 Friday 19 December 2008
(...)
Q: Why didn’t Rudolph go to school?
A: He was elf taught
 
29 December 2008, The Times (London, UK), “Top ten,” pg. 25:
Christmas cracker jokes (...) 7. Did Rudolph go to a regular school? No, he was “elf”-taught.
   
Google Books
A Man Walks Into a Bar 3
By Jonathan Swan  
London, UK: Ebury Press
2010
Pg. 75:
Did Rudolph go to a regular school? No. he was elf-taught!
 
Google Groups: rec.crafts.textiles.quilting
More Seasonal Humour
Jo Gibson
12/11/11
And as the reindeer say before they tell you jokes ....
These jokes will sleigh you!
 
Did Rudolph go to a regular school?
No, he was “elf”-taught!
   
Google Books
Christmas Crackers
By Matt Wilce
Lulu Press (Lulu.com)
2012
Pg. ?:
Did Rudolph the Red Nosed Reindeer go to school?
No. He was Elf-taught!
   
Google Books
Christmas Cracker Jokes For Kids
By Peter Crumpton  
PeteyRF Creative
2015
Pg. ?:
Did Rudolph go to school?
No. Не was Elf-taught!
 
Twitter
Oldham College‏
@OldhamCollege
Did Rudolph go to University? No, he was ‘elf taught! 🎅🏽 Have a Merry Christmas everyone.
10:00 AM - 23 Dec 2016
 
Twitter
UoN Libraries‏
@UoNLibraries
Did you hear that Rudolph the Red-Nosed Reindeer never went to school?
That’s right—he was elf taught. #christmasjokes
3:00 AM - 5 Dec 2017