“I can’t believe pretzels are knot bread”

Pretzels are baked bread often—but not always—shaped into a twisted knot. “Why do people eat pretzels since they are knot food? (Pun of the Day)”—from the website Pun of the Day—was posted on the newsgroup alt.humor.puns on October 21, 2000.
 
“Pretzels are knot bread” is a pun that was posted to the newsgroup rec.games.roguelike.nethack on August 9, 2005. “I can’t believe pretzels are knot bread” was posted on Twitter on June 12, 2011.
 
“Pretzels are dough knots” is another oneliner about pretzels and knots.
 
   
Wikipedia: Pretzel
A pretzel (German: Brezel) is a type of baked bread product made from dough most commonly shaped into a twisted knot. Pretzels originated in Europe, possibly among monks in the Early Middle Ages. The traditional pretzel shape is a distinctive nonsymmetrical form, with the ends of a long strip of dough intertwined and then twisted back into itself in a certain way (“a pretzel loop”). Pretzels now come in different shapes.
     
Google Groups: alt.humor.puns
“Puns of the Weak” 10/20/00
Stan Kegel
10/21/00
(...)
Why do people eat pretzels since they are knot food? (Pun of the Day)
 
Google Groups: rec.games.roguelike.nethack
Lembas wafers
.(JavaScript must be enabled to view this email address)
8/9/05
(...)
4. Pretzels are knot bread.
 
Twitter
Dave
‏@DaveMetzger
My mom bought me a large soft pretzel. It’s not only not bad, it’s knot bread!
6:58 PM - 9 Aug 2009
 
Twitter
Scott Casey
‏@scottjmcasey
RT: @JohnSurname: Despite what you’ve heard, a pretzel is knot-bread! #tweetlikeLeighSales
1:43 AM - 8 Sep 2009
 
Twitter
Geoff Whitfield‏
@TacoGeoff
Signboard for today- “Pretzels are knot food”
9:51 PM - 27 Apr 2010
     
Twitter
Murray Steinard‏
@Lensman23
Pun of the Day:  Why do people eat pretzels since they are knot food?
10:10 AM - 24 Jun 2010
 
Twitter
Darren Wright
‏@WrathGrinder
i just ate a few pretzels. i can’t believe they’re knot bread…
12:43 PM - 12 Jun 2011
 
Twitter
Edward Mayes
‏@eljmayes
I can’t believe pretzels are knot bread.
12:52 PM - 12 Jun 2011
 
Twitter
Cameron Borét
‏@CameronWadeB
Can’t believe Pretzels are knot bread
1:19 PM - 12 Jun 2011
 
Google Books
5,000 Great One Liners
Compiled by Grant Tucker
London: Biteback Publishing
2012
Pg. ?:
I can’t believe pretzels are knot bread.
 
Facebook
Dad Jokes
May 25, 2015 ·
I can’t believe pretzels are knot bread
(stolen)
 
Reddit—Punny
Did you know that pretzels are knot bread? (self.Punny)
submitted May 29, 2015 by lolalodge
I’m serious.
 
Google Books
Dad Disasters:
When Dads Go Bad
By Ian Allen
New York, NY: Pavilion Books
2016
Pg. ?:
If pretzels are knot bread, what are they…?