“Why did the tofu cross the road?”/“To prove he wasn’t chicken.”

“Why did the chicken cross the road?”/“To get to the other side” is a classic riddle from the 19th century. A tofu version is:
   
Q: Why did the tofu cross the road? 
A: To prove he wasn’t chicken.
   
The tofu joke has been cited in print since at least 2008.
 
“Why did the vegan meat cross the road?”/“To prove it wasn’t chicken” is a similar riddle.
   
     
Vegetarian, Vegan, and Animal Rights Jokes (March 21, 2008)
Rhi
Why did the tofu cross the road?
To prove he wasn’t chicken.
 
The Province (Vancouver, BC)   
Vegetarianism and Going Green ARE Laughing Matters - A Few Jokes About Vegetarians And The Environment
GINGER SEDLAROVA
Published:
October 16, 2008
Updated:
June 13, 2016 12:23 PM PDT
(...)
Why did the tofu cross the road?
To prove he wasn’t chicken.
 
Twitter
Your Daily Vegan
@YourDailyVegan
Corny joke of the day:  Why did the tofu cross the road?  To prove he wasn’t chicken! (ba dum bum!)
12:24 PM - 21 Apr 2009
     
May/June 2009, Vegetarian Times. pg. 12:
Why did the tofu cross the road?
To prove he wasn’t chicken. - MONICA
       
Google Books
The Mammoth Book of One-Liners
Edited by Geoff Tibballs
London, UK: Constable & Robinson Ltd
2012
Pg. ?:
Why did the tofu cross the road?
To prove it wasn’t chicken.
     
Reddit—Funny
My favourite new age joke (self.funny)
submitted April 9, 2013 by Kimmberlias
Why did the tofu cross the road? .........
To prove it wasn’t chicken.
 
Google Books
Funny Food Jokes
By Sally Lindley
New York, NY: Windmill Books
2017
Pg. 14:
Why did the tofu cross the road?
To prove it wasn’t chicken!
 
Metro (UK)
6 of the funniest questions vegans get aske
Dave Chawner
Wednesday 27 Sep 2017 2:13 pm
(...)
This is my favourite vegan joke, that someone asked me completely out of the blue.
 
Why did the tofu cross the road? To prove he wasn’t chicken!
   
Reddit—Vegan
Why did the tofu cross the road? self.vegan
Submitted February 22, 2018 by MorningCauldronvegan
To prove he wasn’t chicken
........ And banned
 
Twitter
lorraine Jo King
@LahLahBean
#tuesdaytitters
Why did the tofu cross the road?
To prove he wasn’t chicken.
2:04 AM - 18 Sep 2018