How do I tell which plants are poisonous?

Blake said:

Not in any way that I can understand, nor in my experience.
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My point was not to eat what you see other animals eating, my point was that it does not do you much good to starve to death looking for raspberries because you know you can eat them if everything else eats them, too, and gets there first. If something is scarce, it is probably not worth your effort to find out if you can safely eat it. If you are going to go through the 3 day process to test something, test something that you have a chance of finding enough of to keep you alive.

I’m still waiting on a cite that humans’ digestion is closer to pigs’ than to monkeys’.