On: I'm on a deserted island. How can I tell which plants are poisonous?

[CWuestefeld]

Bottom line: If there's any there, it's not safe to eat it. If they're all gone, then they would have been safe.

Next chapter, how to test for witches by the flotation method.

[billswift → CWuestefeld]

>If they're all gone, then they would have been safe.

WRONG. Birds can eat a lot of things that would make you very sick.