Jeff Winger: Have you learned nothing from your insipid Twilight books? Men are monsters who crave young flesh.
Cooperative Calligraphy - S2-E8
Shirley Bennett: Uh, Jeff, you don't have a bag?
Jeff Winger: Oh, I could never deprive the world of a portion of my chest the strap would cover.
Jeff Winger: Greendale may be a toilet, but it's our toilet, and nobody craps in it but us.
Messianic Myths and Ancient Peoples - S2-E5
Abed: I used to think all Jesus did was walk on water and tell people not to get abortions, but now I see he's so much more than that. He's like E.T., Edward Scissorhands, and Marty McFly combined.
Answer: It was part of the plot that when the boiled yam was dropped it looked like it was stepped on (which it never was). So there was no way to tell the difference between the flesh being soft because it was boiled or because it was stepped on (in the show that is, I don't know if one could tell the difference in real life). Plus, the rest of the yam wasn't boiled, so there was no evidence the yam was sitting in boiling water.
Bishop73