After a few decades of just packing our noggins with reality TV and hearsay, it's easy to find ourselves subscribing to nature survival myths that simply aren't true, and could get us killed. Watching Bear Grylls squeeze elephant dung into his mouth for water probably did a lot more harm than good for our collective understanding of survival situations, but hey, at least we got to watch a millionaire drink freshly squeezed poop juice.
And it's a little bit our own fault for believing the wrong stuff. We probably hold on to unconfirmed survival facts for too long. It's extremely possible that you believe something because your friend's older brother told some total BS in 3rd grade and you just internalized it without googling it. So every once in a while it's good to do a bit of an audit and see how much you don't know about basic survival.
But honestly, if it wasn't obvious before; don't drink the dung.