With various attributions and formulations, how can the "Rule of Threes" be applied to the gear of an individual going solo? What is really practical?

Clarification: The Rule in question is sometimes expressed as "one is none, two is one, three is a spare."

If I understand you correctly, the "Rule of Threes" applies with equal force, whether you are solo or in a group...

Are we talking about the ida of surviving for up to 3 minutes without air, up to 3 days without water, and up to 3 weeks of without food? Or is it Jack Tripper has to pretend to be gay to live with Janet and Chrissy?

My bad. I was thinking of the "one is none, two is one, three is a spare" ideas.

I climb mountains for fun. If you carry too much stuff up a mountain, you will be slow and end up needing your stuff.

Light and fast does not really mix well with reduncancy. Redundancy is your mates pack and simply not lossing/breaking things. (Don't go solo in the mountains).

That rule of threes is one of my pet peeves. it is just an excuse to load up on more gadgets. One exception seems to be for many of us is redundancy in tools and equipment to start a fire.

Tjin nailed it in his response....

Going solo really has nothing to do with it or with how much gear you pack. When solo, everything - all the decisions, all the actions - for good or ill - are your responsibility. The situation is both liberating and burdensome at the same time.

gear is important, but knowledge is king.

i find the redundant rule helpful and use it, but it means nothing if those items are left in the tent while you're hiking a trail. its what in the pockets/pack you have with you that count.

regarding size/weight of carrying all these muliple items: get smaller/lighter. in other words, three tiny AAA flashlights may be a better/smaller/lighter option than a single larger/heavier light...

That's not a rule, it's barely an axiom. As I recall the statement was, "one is none and two is one". The second one is the back-up, there's no three.

The actual Rule of 3 in survival is about continuing to live -- air, water, food -- the basic necessities of life.

I believe it's an army born adage to account for dumbest among dumb.

Alright, how many of you carry a spare of any item in your EDC kit? How many of you carry two spares of any item?