You can eat a small amount of arsenic without dying, so that’s been tested. (Plus, death from arsenic poisoning isn’t instant, so you could ask someone.) IIRC, the claims about the smell of hydrogen cyanide come from one person that survived inhaling a very small amount accidentally.
How do you know?
You can eat a small amount of arsenic without dying, so that’s been tested. (Plus, death from arsenic poisoning isn’t instant, so you could ask someone.) IIRC, the claims about the smell of hydrogen cyanide come from one person that survived inhaling a very small amount accidentally.