Earlier quoted context omitted.
Surely all glue is edible, you just have to commit a bit more to some glues than others. It's like that saying about mushrooms: "All mushrooms are edible. It's just that some mushrooms you only get to eat once."
I was taught “Edible (fit to be eaten as food) vs Eatable (capable of being chewed up and swallowed)” but modern usage seems to treat them as synonyms (the former just being more pleasant to eat than the latter).
Is it edible? Yeah, it is eatable.
Here I am, years later, learning I was right all along.