• Flying Squid@lemmy.world
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    5 months ago

    I don’t eat meat, but the more we learn about plant intelligence, the less I can say with confidence that plants do not have their equivalents of things like pain and emotion. It doesn’t help that we have great difficulty defining what emotion means.

    But we know a lot about plants now that we thought were animal things. Grass “panics” or “screams” by sending out chemical signals when you cut it as a warning to others of its species that they are seriously injured and danger is coming. That’s what the smell of fresh-cut grass is. Sure, calling it a panic or a scream is anthropomorphizing it, but it’s kind of hard to describe it in other terms.

    We also have learned about “mother trees,” which will send resources to their offspring if the offspring let the mother tree know they are in desperate need of them. Which sounds very much like parenting in animal species. There’s also lots of evidence that plants can learn from experiences and retain some sort of memory of them in some capacity.

    Do I think plants have the same sort of sentience as animals and will I stop eating broccoli? Of course not. But I will still have to admit that at the end of the day, I might just be choosing to cause a different kingdom of life pain and suffering because it’s far enough away from my species that I don’t consider that to be pain and suffering.

    • zarkanian@sh.itjust.works
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      5 months ago

      If you’re eating meat, then you’re contributing to the death of all of those plants that had to feed the animals you’re eating. Even if you grant plants sentience, veganism is still the more ethical option.

      • Flying Squid@lemmy.world
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        5 months ago

        Is “more ethical” really enough if you accept that plants can suffer? You’re still essentially saying one group of living things’ suffering is acceptable to you. Isn’t that like saying the holocaust of the Jews was bad, but the holocaust of the Roma at the same time was fine because there were fewer Roma than Jews? Does “less” matter when we’re talking quantities so massive?

        I don’t think there are easy answers to any of these questions. Not if you want to approach them from an honest philosophical level.

        • zarkanian@sh.itjust.works
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          5 months ago

          Is “more ethical” really enough if you accept that plants can suffer

          I don’t accept that, but even if I did, you should still act to minimize suffering as much as possible.

          Do you really believe that killing a plant is the same as killing an animal?

          • Flying Squid@lemmy.world
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            5 months ago

            I literally wrote this:

            Do I think plants have the same sort of sentience as animals and will I stop eating broccoli? Of course not.

            I guess you didn’t actually read my entire post before you responded.

            • trashgirlfriend@lemmy.world
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              5 months ago

              Honestly it just seems like you’re trying to contort yourself into a knot that allows you to eat meat without feeling bad?

                  • Flying Squid@lemmy.world
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                    5 months ago

                    No worries. My point was that I cannot make a claim at this point that plants definitely do not feel pain and suffering regardless of whether or not I am willing to eat them. There are other reasons good not to eat meat, such as environmental reasons, but I cannot honestly say for certain that when I eat a plant, harvesting it did not cause it pain and suffering because the more we learn about plants, the more we learn that they do have similar systems to animals in many ways even though they do it differently.

                    Does that make it more ethical in terms of causing pain and suffering to eat a plant rather than an animal just because their pain is not from same sort of nervous system as an animal’s? Can we be certain that their reactions to being harmed or in trouble in some way, such as the chemical signals and the mother tree examples above isn’t an expression of pain and suffering? I honestly do not know. We all have to eat to survive, so we have to make choices on this regardless of what the science tells us. The only way out of this, as someone else pointed out, is Star Trek replicators.

                    We also just don’t know enough yet, so this discussion is more speculative because we just don’t have good definitions for ‘pain’ and ‘suffering’ outside of our limited human perspective. It sure seems like all mammals feel pain. It’s hard to tell if insects feel pain. It’s really hard to tell if plants feel pain.

        • AnimalsDream@slrpnk.net
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          5 months ago

          If our ability to modify ourselves reaches sci fi levels, allowing us to photosynthesize and fix amino acids from nitrogen in the atmosphere (or if there’s any hope of making that happen), then that likely will be the new vegan position.

          • Flying Squid@lemmy.world
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            5 months ago

            Photosynthesis would probably not work too well for people who aren’t outside a lot. But there might be other possibilities.

              • Flying Squid@lemmy.world
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                5 months ago

                I know you’re being flippant, but I do like the idea of coming up with a variety of ways for humans to get food which don’t require life at all. Finding a way to make a construction worker photosynthetic but also finding a way for an office worker to be chemosynthetic. Hydrogen and methane are in abundance on the planet and bacteria can use them as food. Maybe one day we can too

        • AA5B@lemmy.world
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          5 months ago

          It’s the fish argument all over again. Some vegetarians reason they can eat fish because fish has simple enough nervous system that it can be aware of its suffering. Sure it reacts to pain, but is it aware?

          Similarly, grass may react to damage, but have such simple systems that you can’t even call it pain, much less that they have any awareness of pain

            • AA5B@lemmy.world
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              5 months ago

              Not at all, it’s just a reaction. When you drop your mentos into Diet Coke, you see a very excited reaction, but do you really call that an emotion or can you really connect that with any entity’s awareness?

              • Flying Squid@lemmy.world
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                5 months ago

                Mentos and Diet Coke are not alive. Plants are. Mentos and Diet Coke are also not having reactions to being damaged that signal that damage to other cans of Coke and packs of Mentos. Plants do. That is not a good analogy.

            • Asifall@lemmy.world
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              5 months ago

              There is an interesting catch to this argument, which is that in a human body we can eliminate pain by using general anesthesia or nerve blockers. Locally the body still reacts to damage but the actual person doesn’t experience any pain because it isn’t communicated to their consciousness. If we accept that being unconscious precludes experiencing pain then it follows that consciousness is a pre-requisite for pain.

              On the other hand if it’s still unethical to inflict damage on a living thing without consciousness then is it unethical to operate on a sedated person even though they don’t consciously experience pain?

              • Flying Squid@lemmy.world
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                5 months ago

                Very interesting points, and this was the sort of discussion I was hoping to have. These are complex ethical questions without simple answers and in 100 years, people may look back at any eating choices made in this time, be they vegan or 100% carnivore, to be absolutely nuts because none of us have figured out that the real key to good and ethical nutrition is everyone eats a soup made from cloned moose DNA and petroleum. Science is constantly changing and moving on, so who knows? But it’s an interesting thing to talk about, at least to me.

                For now, I am on the side of those who say it is not ethical to eat meats, but it is ethical to eat plants. In 20 years of plant science? Who can say?

      • commie@lemmy.dbzer0.com
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        5 months ago

        if you grant plants sentience, veganism is still the more ethical option.

        … for ethical systems in which sentience is a consideration.

          • commie@lemmy.dbzer0.com
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            5 months ago

            I can only think of one that does: utilitarianism. it’s frought with epistemic problems not to mention it can be summed up “the ends justify the means” which most people think is itself unethical.

      • commie@lemmy.dbzer0.com
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        5 months ago

        If you’re eating meat, then you’re contributing to the death of all of those plants that had to feed the animals you’re eating

        impossible. an event in the future cannot cause an event in the past.

        • zarkanian@sh.itjust.works
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          5 months ago

          “Yes, your honor, he did kill my wife and I did give him money. However, I gave him the money afterwards, and effects cannot occur before causes, so there’s no possible connection.”

          • commie@lemmy.dbzer0.com
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            5 months ago

            surely you can see that there are going to need be more evidence. some kind of communication prior to the fact is probably going to need to be established.

            • flerp@lemm.ee
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              5 months ago

              It’s called supply and demand. They know there is a demand for meat so they grow animals and feed those animals plants. Continuing to eat meat supports a system that consumes more plants than a system where humans only eat plants. You shouldn’t need your hand held for this, it’s pretty basic stuff.

              • commie@lemmy.dbzer0.com
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                5 months ago

                You shouldn’t need your hand held for this, it’s pretty basic stuff.

                this is just posturing. it doesn’t support your (erroneous) claim, nor does it undermine my (obviously correct) position.

              • commie@lemmy.dbzer0.com
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                5 months ago

                supply and demand.

                that’s a theory about price discovery that actually has no predictive value. it is not a magic phrase that traverses space-time

                • rekorse@lemmy.world
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                  5 months ago

                  Okay so you are responsible for the next dead cow that the company has to produce now to replace the one you bought.

                  Your action led to a dead cow in the future.

                  Does that work?

                  • commie@lemmy.dbzer0.com
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                    5 months ago

                    Your action led to a dead cow in the future.

                    Does that work?

                    no, that’s not causal. but even if it were, it doesn’t make me responsible for the killing of the plants or animals in the past.

                  • commie@lemmy.dbzer0.com
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                    5 months ago

                    the company has to produce now to replace the one you bought.

                    no, they don’t. they could choose not to do that. I am not responsible for their choices.

        • Floey@lemm.ee
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          5 months ago

          When you eat animals you give the market a financial incentive to breed and slaughter more animals, who inevitably have to eat a bunch of plants to grow. It’s not that you eating a burger kills a cow, but you eating a burger helps make it financially sound and socially acceptable to murder cows for burgers.

    • naevaTheRat@lemmy.dbzer0.com
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      5 months ago

      You’re conflating very different processes here. While there is the hard problem of consciousness and we can’t falsify ideas like panpsychism consider a few things.

      If you amputate my hand and press on it it will emit nervous signals. Does anyone feel pain? If you destroy most of my brain but keep me alive, then stab me almost all the nervous activity and hormones etc associated with injury will happen. Is there any reason to believe there is any pain felt?

      I would say no in both cases, pain is not emitting nervous impulses, or something that precedes releasing endorphins and inflammatory factors etc. Pain cannot even necessarily be reliably correlated with stress markers like heart rate, and in the case of phantom limb syndrome pain can even be associated with a complete lack of signals.

      There are good evolutionary reasons to exhange information and resources, even unwittingly. Apparently some bacteria in my tummy are in conversation with my body constantly but I’m not at all aware or actively participating in that. Maintaing pain only really seems to offer advantage if you can do something about it, while it’s possible for things to exist accidentally it’s not like grass can move to places without mowers or trees shade themselves. In all animals with nervous systems the nervous systems are the vastly most expensive thing to keep alive. In fact there are a few creatures who when entering an immobile stage of life rapidly digest their own (a good explaination for both tenure and retirees!).

      Plants don’t have rapid long distance communication in their bodies, they don’t have centralised organs, they don’t even have anything approaching the levels of activity we associate with the simplest nervous systems.

      It’s probably best to think of grass “screaming” as skin cells “screaming” for resources to make more melanin when exposed to UV. Or lymph nodes “screaming” when releasing hormones to heal a wound and stuff. This is all vastly below the level of consciousness.

      Or whatever, embrace panpsychism, like the invisible dragon in my garage nobody can prove it false /shrug. Animals eat plants though and thermo law 2 is a thing so even panpsychics minimise suffering by being plant based.

      • Flying Squid@lemmy.world
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        5 months ago

        But what I am arguing is that is an anthropocentric view of what constitutes pain and suffering. We cannot assume either is not possible without a nervous system. It’s worth at least looking into the concept even though we don’t know that there would be a mechanism simply based on what we know about plants so far. I myself would put myself on the no side when it comes to whether or not plants feel pain, but I couldn’t say that it was a 100% definite no by any means and I think we may feel very differently about what it means to be a plant and what plants are capable of in 20 years.

        • naevaTheRat@lemmy.dbzer0.com
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          5 months ago

          You’ve got to operate on evidence, there’s an infinite number of things you can’t falsify and you have no criteria for choosing which to believe or not.

          In other animals we observe things consistent with pain such as long term behaviour modification in the absence of a persistent hormone. Things like avoiding places they were injured, becoming more cautious or less curious, even changes that destroy them like starving themselves to death.

          Anyone that says “only humans feel pain” is a chauvinist ignoring stuff like rats giving up the will to live.

          But trees or mosses or whatever do none of this. A tree will keep trying to grow towards a fence that damages branches in a storm, a tree never starves itself to death making thicker bark after teens carve lovehearts into it, a tree doesn’t stop reproducing after 3 droughts kill all its children and so on. Leaves might change colour in response to periods of high or low sunlight but these changes are like tanning, they don’t modify anything about how the tree trees.

          We can’t know is true, but we also can’t know I don’t have an invisible dragon in my garage. you should definitely not live your life thinking I have an invisible dragon in my garage. Why? you don’t have any evidence to suspect it’s real that is distinguishable from a random lie. We have no evidence of behaviour in trees indistinguishable from chemical signals we know are below the level of consciousness in ourselves.

          • Flying Squid@lemmy.world
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            5 months ago

            But trees or mosses or whatever do none of this. A tree will keep trying to grow towards a fence that damages branches in a storm, a tree never starves itself to death making thicker bark after teens carve lovehearts into it, a tree doesn’t stop reproducing after 3 droughts kill all its children and so on. Leaves might change colour in response to periods of high or low sunlight but these changes are like tanning, they don’t modify anything about how the tree trees.

            I don’t know why any of this means that our nebulous definitions of ‘pain’ and ‘suffering’ cannot apply to plants.

            If I stub my toe, it doesn’t modify anything about how I human. But it hurts.

            • naevaTheRat@lemmy.dbzer0.com
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              5 months ago

              It does though, you will stop walking. Clutch your foot, say ow, look at where you hit the thing, be more careful when walking near there, move the object, pad the object, maybe wear protective covers on your feet, maybe dress a wound if the nailbed was damaged etc. If your toe keeps hurting you will travel to a doctor for assessment, or splint the toe and so on.

              Unless you don’t notice, in which case you feel no pain despite the toe signalling furiously.

              Along side this a bunch of cellular processes will happen to repair the damage, but they happen even if you don’t notice (distraction/nerve damage, anaesthetic etc) and so we can notice “huh, there are 2 clusters of things happening, one is conditional and one isn’t” and that’s a clue that there’s something more going on than just a body repairing itself.

              • Flying Squid@lemmy.world
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                5 months ago

                Damaged plants can send out signals to other plants, and chemicals to repel what is damaging them (to the specific area where the damage is being done) and repair their damage. Some plants will avoid growing towards areas that they have been unable to thrive in before.

                You still seem to be talking about things from a purely human perspective. Dogs will damage their feet and not even let you know sometimes. They will get a piece of glass in their foot and they won’t stop walking on them or try to do anything about it until they literally can’t do anything about it. My dog tore her CCL and the only reason we knew anything was wrong was that she wasn’t limping and then she was a few moments later. She didn’t make a sound, she didn’t react with any sort of signal that indicated that she was aware serious damage had been done to her, she just was unable to use that leg. Are you going to argue that she felt no pain?

                • naevaTheRat@lemmy.dbzer0.com
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                  5 months ago

                  Damaged plants can send out signals to other plants, and chemicals to repel what is damaging them (to the specific area where the damage is being done) and repair their damage.

                  Could you please explain how this can be distinguished from wound healing in a human. Like what chemicals are sent out? what is the mechanism? are they transported anywhere in particular? are different signals collated in determining a response or does the same hormone guarantee the same response in a dose dependent manner?

                  Some plants will avoid growing towards areas that they have been unable to thrive in before.

                  This is surprising to me, is it distinct from following chemical gradients? I have never seen this, or heard about it. The closest I would say I have ever seen is not growing towards salt or dry soil. What is the evidence here please as I don’t know what you’re talking about. Is there a memory effect? if a grass doesn’t grow south and you put it in a new area will it also not grow south?

                  You still seem to be talking about things from a purely human perspective. Dogs will damage their feet and not even let you know sometimes.

                  I’m really not, I had a whole thing about memory and will to live and avoiding areas where I specifically spoke about rats.

                  Whether or not you notice it (and it’s true that many animals will try to hide injuries, humans included) doesn’t mean there is no modifications to behaviour. E.g. licking, protecting the area (less weight on paw, lifiting it up etc), reacting to the same stimulus more negatively such as not eating or growling etc when being touched.

                  You literally said she stopped using it. Aka she felt pain. Ever eaten after a dentist when your mouth is still numb? you will straight up bite off chunks of your lips and keep eating. If there was no pain she would keep trying to use it and probably just be confused when it didn’t work. Which btw is how she’ll behave if you anaesthetise her!

                  Also if you’ve ever noticed her behaviour after removing say a piece of gravel from between the pads in her feet you’ll probably notice despite no damage the first step or two will be tentative. She’s anticipating pain, again behaviour modification.

                  Plants just don’t do anything like this.

        • feedum_sneedson@lemmy.world
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          5 months ago

          Plants do have incredibly impressive defence mechanisms, but that doesn’t mean onions are crying when you cut them. There’s no central nervous system, you are anthropomorphising. That is very common whenever this topic comes up, but it really is magical thinking, and the garden is already magical enough without imagining fairies at the bottom.

          • Flying Squid@lemmy.world
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            5 months ago

            Why doesn’t it mean onions are crying out? Why is a nervous system necessary for pain or suffering? How can we know that? How am I anthropomorphizing if we do not have a functional universal definition of ‘suffering?’ If you’re going to make that claim, you’re going to say I can’t prove cows suffer.

            • feedum_sneedson@lemmy.world
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              5 months ago

              I studied plant signalling/phytohormones during my MSc, it’s genuinely fascinating but it doesn’t imply consciousness. Cows have a central nervous system. Beyond that, it’s magical thinking. You are making an unfalsifiable claim, and that’s fine, but please acknowledge that you are adopting a faith-based position here. I could claim the sentience of crystals and be similarly obstinate when challenged.

    • MonkderDritte@feddit.de
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      5 months ago

      It doesn’t help that we have great difficulty defining what emotion means.

      There was this thing about fishing with hooks. Apparently it’s ok, since fishes don’t have the facilities to process pain as anything different than a robot would interpret sensory input.

      • Flying Squid@lemmy.world
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        5 months ago

        Fallacy

        A (potentially) thinking or feeling plant has to be killed in order to eat it just like an animal has to be killed, and there’s no difference between the two.

        Did you not read what I wrote? I made it very clear that there were a lot of differences.

        And the fun part is that you’re the second person to tell me that I was trying to justify eating meat when, again, the first four words of my post are “I don’t eat meat.” I couldn’t have been more clear on that point.

        • mathemachristian[he]@lemm.ee
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          5 months ago

          no dude its about the resources, like you claim that plants can feel pain or something stupid like that, read up on it.

          Also

          But I will still have to admit that at the end of the day, I might just be choosing to cause a different kingdom of life pain and suffering because it’s far enough away from my species that I don’t consider that to be pain and suffering.

          sure sounds like think the “pain and suffering” of the two “kingdoms of life” might be equal.

              • Flying Squid@lemmy.world
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                5 months ago

                I wasn’t trying to make up any sort of debate. You are the one trying to debate here. And you’re not doing it very well either.

                • mathemachristian[he]@lemm.ee
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                  5 months ago

                  Oh man how do we even define emotion, like what does it mean for something to be in pain, where do we even draw the line dude at sentience or at pain, what a quandary this all is

                  is what I got from your post. And its easily answered by “plants dont feel pain”.

                  • Flying Squid@lemmy.world
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                    5 months ago

                    What you got from my post and what I actually said have already been established to be very distant from one another.

                    And, again, I am not the one trying to debate anything here despite you accusing me of it.