this post was submitted on 04 Feb 2025
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Wikipedia defines common sense as "knowledge, judgement, and taste which is more or less universal and which is held more or less without reflection or argument"

Try to avoid using this topic to express niche or unpopular opinions (they're a dime a dozen) but instead consider provable intuitive facts.

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[–] ace_garp@lemmy.world 7 points 6 hours ago

To tilt your head back if you have a blood nose.

This is no longer recommended advice, because you end up drinking the blood which causes vomiting.

  • Probably initially said by someone concerned about their carpet.

Way to stop them is put ice over the back of neck, plug nose with tissue and clear clots each 2 mins.

[–] semperverus@lemmy.world 3 points 7 hours ago

Common sense isn't just "not so common," it is a fundamentally broken concept at its core and a crutch that people use to hoist themselves above others they feel they are better than.

[–] folaht@lemmy.ml 6 points 12 hours ago* (last edited 8 hours ago)

The most vulnerable will be hit the hardest.

  1. Countries are rich because they have free markets.
  2. Tariffs are a good thing and competition is for losers.
  1. No one deserves a handout, as money should be earned.
  2. Large companies deserve a giant economic stimilus, because if we don't, our economy will crash.
  1. Being spied upon by your government or foreign governments whom I worship is okay, because I've got nothing to hide.
  2. Outsiders that sells goods that can be used to spy obviously and should be barred from all markets forever because they'll definitely spy on you and spying is wrong.
  1. If you feel threatened by another country, a pre-emptive strike should be allowed.
  2. You don't mess with the sovereignty of a nation. It's sacred and should be left intact.
  1. Police should always be allowed to use overwhelming force and their actions should be lauded
  2. You should have the right to protect yourself using firearms against tyranny as governments in general are never to be trusted.
[–] HiddenLayer555@lemmy.ml 45 points 22 hours ago* (last edited 21 hours ago) (1 children)

A lot of outdoor survival "common sense" can get you killed:

Moss doesn't exclusively grow on the north side of trees. Local conditions are too chaotic and affect what side is most conducive to moss. Don't use moss for navigation.

Don't drink alcohol to warm yourself up. It feels warm but actually does the opposite: alcohol opens up your capillaries and allows more heat to escape through your skin, which means you lose body heat a lot faster.

Don't eat snow to rehydrate yourself. It will only make you freeze to death faster. Melt the snow outside of your body first.

Don't assume a berry is safe to eat just because you see birds eating them. You're not a bird. Your digestive system is very different from a bird's digestive system.

If you've been starving for a long time, don't gorge yourself at the first opportunity when you get back to civilization. You can get refeeding syndrome which can kill you. It's best to go to the hospital where you can be monitored and have nutrients slowly reintroduced in a way that won't upset the precarious balance your body has found itself in.

[–] keepcarrot@hexbear.net 5 points 19 hours ago

Moss doesn't exclusively grow on the north side of trees.

My brain was like "why do people so desperately need to find moss that it not being on the north side would mean death?" Before remembering many people don't know which way they are facing (or left and right) usually. (Also, I'm sure I'd do worse in an unfamiliar area)

[–] whotookkarl@lemmy.world 11 points 18 hours ago (1 children)

Is common sense just an earlier, naive label for confirmation bias?

[–] comfy@lemmy.ml 8 points 16 hours ago

A key aspect is that it doesn't even require confirmation.

[–] CanadaPlus@lemmy.sdf.org 32 points 22 hours ago (3 children)

Folk idioms that contradict each other are my favourite. For example, "the cream rises to the top" vs. "it's not what you know, it's who you know".

[–] Nemoder@lemmy.ml 5 points 8 hours ago

I like to try and combine these to see what kind of reactions I get.
The cream rises to who you know.
The squeaky wheel gets hammered down.
He who laughs last, comes around.
Great minds killed the cat!

[–] CileTheSane@lemmy.ca 22 points 21 hours ago

"The squeaky wheel gets the grease"

"The nail that sticks out gets hammered down."

[–] comfy@lemmy.ml 5 points 16 hours ago

Good call, I'll start looking out for these!

[–] culpritus@hexbear.net 48 points 1 day ago (3 children)

'Building more lanes will reduce traffic' is a classic.

[–] MeowZedong@lemmygrad.ml 13 points 23 hours ago (1 children)

I think it's just missing a bit of specificity.

Building more bike lanes will reduce traffic. Building more bus lanes will reduce traffic. Building more tram lines will reduce traffic. Building more car lanes will ~~reduce~~ induce traffic.

Not perfect, but solid logic within reason (Building 100 more bus lanes will reduce traffic).

[–] SocialMediaRefugee@lemmy.ml 6 points 22 hours ago

They enlarged rt 3 near rt 95 in MA many years ago. It was getting backed up due to all of the people moving further out from Boston. I said "It will be full again in a few years." Yup. It was moving well for a few years so everyone piled into that area because the commute was better and within a few years it was a traffic jam again.

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[–] some_guy@lemmy.sdf.org 35 points 1 day ago (1 children)

Police are there to help you.

[–] ryathal@sh.itjust.works 5 points 12 hours ago

They can help you for the rest of your life

[–] MNByChoice@midwest.social 52 points 1 day ago* (last edited 23 hours ago) (9 children)

That budgets for households, businesses, and goverments have much to do with each other

Edit: fixed typo. 'nd' to 'and'.

[–] callouscomic@lemm.ee 37 points 1 day ago (1 children)

Hurr durr but the national debt is like a credit card and all debt is bad. China can just say pay up and we're fucked.

And other stupid shit my parents used to say.

[–] CanadaPlus@lemmy.sdf.org 9 points 22 hours ago* (last edited 22 hours ago)

China can just say pay up and we’re fucked.

Yeah, them and what army? (Well, the PLA, but going into MAD and great power military strategy would be too much of a digression)

A classical example of Westerners thinking human laws are laws of physics somehow. I assume, anyway. It'd be weird to hear this from anyone recently imported.

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[–] naught101@lemmy.world 62 points 1 day ago (3 children)

Less tax is better.

No saying that taxation as it currently exists it optimal, but any decent assessment of how to improve things requires a lot of nuance that is nearly never considered by most people.

[–] qjkxbmwvz@startrek.website 19 points 23 hours ago (1 children)

I'm not mad at the huge amount I pay in taxes. I'm mad about what I get in return.

[–] naught101@lemmy.world 4 points 19 hours ago

Yeah, that's fair, for sure, to some degree. For instance large fractions of policing funding should be redirected into various social services, and military spending can get fuck off all together.

But also, wealthier people paying more than an equal share of tax is a good thing too, and provides lots of intangible benefits (e.g. better education systems and fewer people in extreme poverty and desperation leads to lower crime rates)

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[–] ImplyingImplications@lemmy.ca 74 points 1 day ago (10 children)

Pretty much anything related to statistics and probability. People have gut feelings because our minds are really good at finding patterns, but we're also really good at making up patterns that don't exist.

The one people probably have most experience with is the gambler's fallacy. After losing more than expected, people think they'll now be more likely to win.

I also like the Monty Hall problem and the birthday problem.

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[–] JackbyDev@programming.dev 5 points 18 hours ago

I view it as a thought terminating clichΓ© people use when they're too lazy ti fully explain themselves. It can be useful for things that are truly obvious, like if you try touching something fresh out of the stove without protection you'll get burned, it doesn't really add anything to bother explaining it.

[–] Contramuffin@lemmy.world 76 points 1 day ago (9 children)

The immune system is strong and defends your body against germs.

The immune system works 100% of 50% of the time. Immunology is the best way to convince someone that it's a miracle that they're still alive. Anyways, get vaccinated. Don't rely on your immune system to figure things out

[–] HiddenLayer555@lemmy.ml 10 points 22 hours ago* (last edited 22 hours ago) (1 children)

The immune system is strong and defends your body against germs.

Which is why you should get vaccinated.

Vaccination primes your immune system so it can mount a coordinated response the first time it actually encounters the pathogen.

[–] Kingofthezyx@lemm.ee 7 points 19 hours ago

Yup, vaccination isn't reinforcements, it's training. It's having the other team's playbook before they even step foot on the field.

[–] QuentinCallaghan@sopuli.xyz 28 points 1 day ago* (last edited 1 day ago) (1 children)

Another variation of that is claiming how getting sick repeatedly is somehow beneficial for getting a strong immune system. That ignores research, as children who have a lot of common infections early in life have higher risk of moderate to severe infections and antibiotic use throughout childhood. That also ignores viruses for which a durable immunity isn't currently possible, such as COVID.

EDIT: Basically the immunity system doesn't work like a muscle.

[–] patatahooligan@lemmy.world 14 points 1 day ago

EDIT: Basically the immunity system doesn’t work like a muscle.

I think the immune system can be likened to a muscle if someone really wants to go with that metaphor, but only if you consider vaccines to be the gym and getting sick is uncontrollable and dangerous physical exertion. So, wanting to develop natural immunity is like wanting to get into street fights to build arm strength. It might kinda work, but you'll also be in a lot of unnecessary danger.

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[–] FourPacketsOfPeanuts@lemmy.world 38 points 1 day ago* (last edited 1 day ago) (16 children)
  • that putting the thermostat up higher will heat the house up quicker (edit: I have in mind a bog standard UK home thermostat)

  • that sugary sweets make kids act "hyper"

  • that the moon's apparent size is due to how close it is to earth (same for seasons and the sun)

  • that your base metabolic rate slows as you age and is primarily responsible for you putting weight on in middle age

[–] howrar@lemmy.ca 1 points 14 hours ago (1 children)

that the moon's apparent size is due to how close it is to earth (same for seasons and the sun)

Explain?

Also, what's the size/proximity of seasons?

[–] FourPacketsOfPeanuts@lemmy.world 1 points 13 hours ago* (last edited 13 hours ago) (1 children)

The visual difference of the minimoon and supermoon is not that great, see here but hold your phone at arms length. This is the maximum difference (taken 6 months apart) that the moon ever is relative to itself. In practice, from one night to the next or one month to the next the difference is barely noticeable.

When people say "the moon was huge tonight" what they are generally seeing is the moon illusion

The reference to seasons is badly worded, but what I was referring to is that the earths seasons have nothing to do with how close to the sun it is

[–] howrar@lemmy.ca 2 points 11 hours ago

Ah, I didn't realize the moon could look bigger/smaller at different times. I thought you were saying that the moon is actually the same size as the sun or something like that.

[–] comfy@lemmy.ml 2 points 16 hours ago

Huh, these are all common sense statements I would have assumed true. Four our of four, good work!

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[–] BmeBenji@lemm.ee 8 points 21 hours ago* (last edited 21 hours ago) (6 children)

β€œSurvival of the fittest”

bitch, explain cows

[–] JackbyDev@programming.dev 9 points 18 hours ago

Fittest for the purpose of being chosen by farmers to participate in breeding.

[–] Kingofthezyx@lemm.ee 11 points 19 hours ago

In all of my ecology classes they were super specific about re-framing that concept as "survival of the fit enough"

You don't actually have to be the best example of something to have your traits carried along, just good enough to consistently make it to reproductive age and then procreate.

It helps explain a lot of weird survival mechanisms - it doesn't have to be the best way to do things but if it consistently works, then it's good enough. Like the old saying "if it's stupid, but it works, then it's not stupid"

[–] CileTheSane@lemmy.ca 13 points 21 hours ago

Cows are the most fit for their environment. Their environment being a useful and sustainable food source for humans to cultivate.

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