I opened this discussion among friends lately. What is inedible? I've heard people eating everything from insects, to chicken hearts, to brains, to snake gallbladder, to diry (geophagism), to dog/cat/cow, to flowers, to tripe, to a million other things. And then all varieties of cow parts (everything from bones to eyes) have at some point wound up in ground beef. There are a million things that one person could call odd, and another delicious.
Clearly, some of us wretch at these things. But others have grown up with them and think of them as ordinary and normal.
So, is it a matter of what is natural and normal to us and our cultures? IS there anything truly inedible (outside of what's clearly not a food, like plastic cups or your television)?
It's like the notion that sin is geographical.
What do the chowhounds think?