Good addition with the "rule of 3's" but to drive home the point, they're not meant to be hard and fast "rules," they're just meant to show what's really important.
And food is near the bottom of the list. Wind-proof, waterproof shelter is near the top.
So all the stuff you see on TV about snaring rabbits, eating snakes and grubs and other nasty stuff is purely made-for-TV entertainment.
