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If you’ve studied survival on any level for camping, hiking, or just military service, I’m sure you’ve heard the phrase, “Two is one and one is none.”
It’s an important rule that you should follow, but do you know what it really means? Things break, get lost, or get taken and sometimes they aren’t easily fixed or replaced in the field. That’s why you need to have a backup for anything critical. There’s a critical point that people miss here though that needs to be addressed.
The concept is very easy but most people get it wrong. This can mean that you’re not quite as prepared as you think you are. Take a second and read what Graywolf says about this rule. You’ll probably see things quite differently: