Well, the last two can work technically
Thinking moss grows only on the north side can get you killed and drinking your own pee just because you're slightly thirsty isn't safe
But you can trick dumb people and train bunnies
The thing is though, some mushrooms also won't kill you for like 3 days so you need to give one to them, wait 3 days then see if it was actually the mushroom that killed them in the first place and not dehydration, insect bite, spontaneous combustion
Thinking moss grows only on the north side can get you killed and drinking your own pee just because you're slightly thirsty isn't safe
But you can trick dumb people and train bunnies