Having had a lengthy career in law enforcement and spent many years exploring, backpacking and vehicle dependent travel, I have found the the two is one, one is none rule to apply more often than not.
If you were never in the military or first responder you may not have heard this saying before.
What does Two is one, one is none mean?
Basically you have more than one way to accomplish a task.
The reality is one option may fail or may be ineffective for the task at hand.
Having been in the military, Feds, Search & Rescue, teaching survival and orienteering and just knocking around for a half a century I agree with the saying "two is one and one is none" completely.
I noticed some in this thread have thought it to death or made something out of nothing totally missing the point you tried to make.
I have redundant ways to do things that I feel are important to my safety, survival or comfort.
I have at least 5 ways to start a fire, 5 ways to put one out, many ways to communicate a cell phone (mostly useless off road where I live), CB, GMRS/FRS and Ham, a hatchet and axe along with 3-4 sharp knives, a shovel, 2 jacks, food for me and Sam, 4-5 working flashlights AND spare batteries, a winch and stuff it needs to go with it, ways to stay warm, ways to stay dry, ways to protect myself and those with me AND
lots of water. If I break down, get stuck or hurt I can go for quite a while with little to no food but depending on the time of the year only a day to maybe 3 with no water.
But most importantly I have the knowledge that I can take care of myself and get out of things happening to me. That knowledge came from my experience or inexperience depending on how you see it, from those who knew teaching or showing me how to do it, reading about it then practicing it on a nice, warm, sunny day where I had a lot of time to practice.
I see people talking about all the stuff they have but not a word about figuring out how to use it when needed or how to set something up. The time to learn and practice is on a nice day with NO stress or need to get going where you can practice staying calm, looking at the problem and thinking out a way to help yourself. It's NOT when you're lost in the middle of the night stuck in hub deep mud in the rain on the side of a hill with a panicky partner screaming in the background.
Unless end of life is imminent or loss of your vehicle is certain, stop and take a minute or two to look and think.
Take a few deep breaths and look around at what happened and where you are, then consider what you have with you that will help get you stop things from getting worse and get you on your way. Then think over how best to take care of the problem and slowly start working towards getting things under control so you can get on your way.