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Science

Group of Biologists Tries To Bury the Idea That Plants Are Conscious (theguardian.com) 284

Frustrated by more than a decade of research which claims to reveal intentions, feelings and even consciousness in plants, more traditionally minded botanists have finally snapped. Plants, they protest, are emphatically not conscious. From a report: The latest salvo in the plant consciousness wars has been fired by US, British and German biologists who argue that practitioners of "plant neurobiology" have become carried away with the admittedly impressive abilities of plants to sense and react to their environments. While plants may curl their leaves in response to touch, grow faster when competitors are near and spring traps when prey wanders into them, the vexed biologists argue that is no reason to believe they choose their actions, learn along the way or occasionally get hurt in the process, as some plant neurobiologists assert.

Bothered by claims that plants have "brain-like command centres" in their root tips, and possess the equivalent of animal nervous systems, the critics counter there is no proof of sentient vegetation or structures within plants that would grant them what the neuroscientist Antonio Damasio has called "the feeling of what happens." Writing in the journal Trends in Plant Science, where plant neurobiology made its debut in 2006, Lincoln Taiz, a botanist at the University of California, Santa Cruz, and seven like-minded researchers state: "There is no evidence that plants require, and thus have evolved, energy-expensive mental faculties, such as consciousness, feelings, and intentionality, to survive or to reproduce."

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Group of Biologists Tries To Bury the Idea That Plants Are Conscious

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  • by Anonymous Coward on Thursday July 04, 2019 @05:09PM (#58874502)

    What nonsense. Just think of all the vegetables currently reading this first post.

  • Kind of hard (Score:5, Insightful)

    by phantomfive ( 622387 ) on Thursday July 04, 2019 @05:10PM (#58874508) Journal
    We don't even know what consciousness is. Maybe they are conscious.
    • Re:Kind of hard (Score:5, Interesting)

      by JoeDuncan ( 874519 ) on Thursday July 04, 2019 @05:19PM (#58874554)

      We don't even know what consciousness is. Maybe they are conscious.

      That's not true at all. Read a book. We have a pretty good idea of it's features and required properties. We know *WHAT* it is - but we're not quite sure HOW it's instantiated. BIG difference...

      • Re:Kind of hard (Score:5, Informative)

        by phantomfive ( 622387 ) on Thursday July 04, 2019 @05:23PM (#58874576) Journal

        We know *WHAT* it is

        Wikipedia gives 7 different proposed definitions of consciousness in the first paragraph. Which definition do you prefer?

        • Re: (Score:3, Funny)

          by Anonymous Coward

          Wikipedia gives 7 different proposed definitions of consciousness in the first paragraph. Which definition do you prefer?

          One that excludes plants.

        • Re: (Score:3, Informative)

          Wikipedia gives 7 different proposed definitions of consciousness in the first paragraph. Which definition do you prefer?

          The reason that there are 7 different definitions means that it's a mixed bag of properties. This is not a problem, though, because we can compare plants and animals on all 7 (or more) definitions. Consciousness is not a binary concept, not some magic spark. It's a fuzzy set of properties. Animals have more of those properties, and plants have fewer.

      • Re:Kind of hard (Score:5, Insightful)

        by ShanghaiBill ( 739463 ) on Thursday July 04, 2019 @07:28PM (#58875010)

        We have a pretty good idea of it's features and required properties. We know *WHAT* it is - but we're not quite sure HOW it's instantiated.

        Please describe a falsifiable test for "consciousness", that can distinguish between a conscious entity, and one designed to mimic consciousness.

        For intelligence, this test is relatively easy, because intelligence is defined by behavior. Consciousness is defined as an internal state.

        Saying an entity is "conscious" is little different than saying it has free will, or a soul.

        • distinguish between a conscious entity, and one designed to mimic consciousness.

          Suppose a clever neuroscientist alters your brain so that your consciousness is changed into a mimic-consciousness, with perfectly identical behavior, but without consciousness.

          Would you be able to describe the difference ? If not, why would you assume there is a difference ?

        • For intelligence, this test is relatively easy, because intelligence is defined by behavior. Consciousness is defined as an internal state.

          Saying an entity is "conscious" is little different than saying it has free will, or a soul.

          NO, that's even sillier but in the opposite direction. It's like life and the definitions of life. There are many things we can clearly identify a living or not living. Coming up with a solid definition is very difficult and there's a big grey area in the middle.

      • Re:Kind of hard (Score:4, Insightful)

        by bill_mcgonigle ( 4333 ) * on Thursday July 04, 2019 @08:31PM (#58875252) Homepage Journal

        We can describe properties that we can measure but we still don't know how it arises nor can we prove if it's generated or tuned at a particular locus.

        There's plenty of science left to learn; no need to jump to pseudoscience or claims of the supernatural at this point.

      • That's not true at all. Read a book.

        Any book in particular? I read "new spring" from the wheel of time and lost consciousness. Does that help?

      • I wouldn't go that far. We haven't got it pinned down. We do know characteristics of consciousness and from that we can emphatically say that many things aren't conscious. But we don't have a complete picture of what it is.

    • by mark-t ( 151149 )
      That assumes that the notion of consciousness has any absolute definition which transcends how we might define it.
    • by hey! ( 33014 )

      It might be more precisely correct to say we aren't clear on what we mean when we use that word... at the very least we can't agree what it means, which makes discussions of it pretty fruitless.

      For example do animals other than humans have consciousness? If you say "no", does that mean no animal other than a human can do *any* of the things that humans do that we attribute to consciousness? That was the position of most science texts when I was young; that animals were like robots and fairly primitive o

    • Re:Kind of hard (Score:5, Insightful)

      by ChromeAeonuim ( 1026946 ) on Thursday July 04, 2019 @05:46PM (#58874682)
      We can debate the meaning of consciousness all day, and as it relates to animal life that might mean something, still doesn't change the fact that plants have nothing relating to any reasonable definition of the term. They react to stimuli, sometimes in interesting ways such as jasmonic communication of pest presence to nearby plants, the movement of some carnivorous plants, and however the Boquila vine is able to mimic nearby plants. That doesn't imply any actual awareness though. Machines can do the same thing; it still doesn't mean they're conscious.

      The whole 'plants are conscious' thing has always struck me as an unscientific, clickbait based attempt to look cleverly contrarian by considering something so highly unlikely to be true that it doesn't merit any real thought at all. There just isn't any evidence whatsoever to suggest that plants are conscious or have anything even remotely resembling the capacity for it. There's just nothing in plant physiology that carries out anything that could be called consciousness. I'm willing to entertain the notion that consciousness could come from something different than the brain was we understand it, but I just don't see it in plants.
      • Re:Kind of hard (Score:5, Insightful)

        by jimtheowl ( 4200185 ) on Thursday July 04, 2019 @06:27PM (#58874834)
        That is a whole lot of "I can't see it" and "there is no evidence".

        For shits and giggles, imagine that complex though processes happened a hundred thousand times more slowly, sometimes over decades, but simple signals could propagate between them. Perhaps a forest can behave in a way similar to a group of neurons.

        If that were the case, we would have no evidence and would not be looking for it, nor would we know how.

        There is an evolutionary argument to be made about some communications between plants. It could be that advance warning of a fire could help the plant prepare and survive by shutting down preemptively.
        • That is a whole lot of "I can't see it" and "there is no evidence".

          Well, yes? You say that like it's a bad thing. Until someone provides even the foggiest shred of evidence to suggest anything beyond what is presently known about plant consciousness, or lack thereof, I apply Occam's razor.

          There's a lot of things that could be true, if we imagine some unknown factor for which we presently have no evidence suggesting it's existence. No one knew that plants could emit volatile compounds in response to insect attack which are detected by nearby plants and trigger the produ

          • "but it also isn't reasonable to give consideration to every hypothetical .."

            I find that an interesting statement. Most people seem to have a discomfort with simply accepting an hypothetical as an unknown.

            The way I see it, proponents of the idea of plant consciousness can believe what they want. If I really needed to have an opinion about it, I would seek evidence for myself, but the fact that I do not share their belief does not require me to judge them as quacks either. I just accept that I do no
            • They can promote the idea all they want, but they've still given me exactly zero compelling evidence to suggest that plants are anything resembling being conscious. As far as I can tell, they're just not. When someone makes an extraordinary claim without equally compelling evidence, I call it as I see it. I can't prove there isn't something we're missing, just like I can't prove that Montsechia & Archaefructus (two of the oldest flowering plants) weren't the result of ancient aliens creating the angi
    • We don't even know what consciousness is. Maybe they are conscious.

      No, they're not. Not by any commonly-accepted definition, even the really stupid ones.

  • by Anonymous Coward on Thursday July 04, 2019 @05:15PM (#58874532)

    In the vast timescales of the universe, it may be completely normal for beings to have a thought once every few million years. Entropy is the final enemy.

    Leading hypothesis show that planets are able to support life in a very small period of their existence, ie have liquid water, atmosphere and mild temperatures. Life needs to evolve quickly to not only adapt, but ensure continued existence by adapting the environment to support and allow life to flourish.

    Plants(all photosynthesis bearing organisms) in all their forms not only have terraformed this planet, but have carefully crafted this planet to support more and more complex life forms. Plants have evolved much further in their own tracks than the animal kingdom collectively has. The animal kingdom has mainly tagged along and adapted to the ever carefully adapting and changing plant kingdom.

    To say they are not conscious without even being able to truly and collectively define what consciousness means is but a drumming of our ignorant ego. The timescales plants have are much further out than mere humans have.

    Aah humans, we think we know it all!! We’re just here to consume the energy that plants have spent billions of years to tame, capture and store.

  • Fuck Off (Score:5, Insightful)

    by Anonymous Coward on Thursday July 04, 2019 @05:19PM (#58874552)

    You can't offer any physical theory for the phenomena of consciousness.
    You can't come up with an objective test for it.
    You can't even rigorously define it.

    Thus, you can't tell me who or what is or is not conscious. For all I know, these biologists are just meat sacks with complex reactions, not actual conscious beings.

    • For all I know, these biologists are just meat sacks with complex reactions, not actual conscious beings.

      Biology is just applied chemistry. #435

  • Second: What test(s) are you using to "prove" (demonstrate) that:
    a) Humans are conscious, and
    b) Plants are NOT conscious?

  • by Anonymous Coward

    Thirty years ago I was at party in college. I was finishing up my degree in biology and the horrible boor that cornered me was a philosophy student who argued (hypothetically) that plants could be sentient. The argument is just a frustrating today.

    • If you're cornered by a boor of a philosopher, just agree mildly and note that you don't really think their observation is "interesting" (lean into the word a bit). Now, of course, you don't find it interesting in the colloquial sense, but to the philosopher this will mean you find his insights banal.
  • I was looking for a new thing to feel guilty about. This sort of ruins it for me.

  • They could be plants. Who needs alien invaders.

  • LiS clearly showed plants are conscious way back in the 60s. Granted, it was the worst episode of the series but, if you can't trust network TV for reliable information then who can you trust?
    • by Livius ( 318358 )

      In fairness, it would be good to see a decades-old documentary backed up by more current research.

    • by Layzej ( 1976930 )
      Here's some proper quackery from 1973:

      "In his many experiments with plant and human interaction he found that the was doing with the plants required that the "experimenters must become part of their experiments." Vogel found that the plants responded to the thoughts of people whom he brought into their presence, one philodendron even sulking (refusing to give any response) when a visitor admitted that he had compared that plant unfavorably to the one he had at home. " - http://bionutrient.org/site/li... [bionutrient.org]

  • by JustAnotherOldGuy ( 4145623 ) on Thursday July 04, 2019 @06:19PM (#58874792) Journal

    The rise of pseudoscience is both alarming and depressing.

    We landed people on the Moon decades ago, we change out hearts, livers, and other organs routinely, and we carry the equivalent of the entire world's computing power in 1965 in our pockets...and yet flat-earthers and chemtail nutters still make the headlines almost daily. Homeopathic medicine is still a thing to many people. And of course, billions of people walk around believing in a magical super-being who will cast them into Hell for the most minor of imagined transgressions, like eating shellfish or engaging in what they claim is "sexual immorality".

    "Plant-brain" promoters are no different despite not having a single paper published in any reputable peer-reviewed journal, EVER.

      It's fucking shameful that so many people believe in such a wide array of utter bullshit.

    • Re: (Score:2, Insightful)

      by Anonymous Coward

      "Plant-brain" promoters are no different despite not having a single paper published in any reputable peer-reviewed journal, EVER.

      Drop the hyperbole.

      First link on google scholar. [sciencemag.org] There are many, but only one example is needed to refute your claim.

      This has been established science for some time now. Scientific progress is made by going beyond what we knew to be true and false by testing and evidence.

      What we don't have scientific evidence for is what we cant have scientific evidence for: what exactly is consciousness. The news story we are discussing is not science at all. Whether or not plants have consciousness is not science. It's ph

      • IANAB, but it's not hard to determine from the abstract that the paper you cited is not about a "plant-brain" system. Rather, it discusses rapid intercellular communication via chemical transfer -- and "rapid" in this context means 8.4 cm per minute. The communication is a response to conditions such as "wounding, heat, cold, high-intensity light, and salinity stresses." I'd hardly call that evidence of a plant-brain system.

    • by yodleboy ( 982200 ) on Thursday July 04, 2019 @06:45PM (#58874900)

      A large number of people have always believed in utter bullshit since the dawn of time. It's certainly nothing new.

    • The pseudoscience of plant consciousness has been around for decades. Cleve Baxter [wikipedia.org] conducted "research" on the subject in the 1960s, and published his "results" [rebprotocol.net] [PDF alert] in the International Journal of Parapsychology.

    • by Empiric ( 675968 )
      billions of people walk around believing in a magical super-being who will cast them into Hell for the most minor of imagined transgressions

      Speaking of pseudoscience, your statistics around the described belief are vastly inaccurate.

      You're confusing your straw man with an actual widely held belief. Name a denomination that believes you will go to hell for eating shellfish.
      • The Bible describes eating shellfish as an abomination in Leviticus 11:9-10, and describes being gay as an abomination in Leviticus 18:22, and I know I've heard a lot about how Christians think all LGBT people are going to hell (and somehow totally deserve it for some unspecified reason), so if we assume Christians have any consistency in their beliefs at all, then they must accept you deserve to be tortured forever in a pit of fire for having some delicious bacon wrapped shrimp.

        Oddly, while there's protes
        • by Empiric ( 675968 )

          I was expecting a real statistically relevant answer, not a non-sequitur of what you've "heard a lot about" (particularly from anti-theists).

          A behavioral error, "abomination" or not, does not imply being sent to hell.

          But let's frame the context of discussion a bit.

          What ultimate outcome are you expecting is appropriate for LGBT individuals, going strictly by, say, science and evolution?

          • What ultimate outcome are you expecting is appropriate for LGBT individuals, going strictly by, say, science and evolution?

            Exactly the same outcome that's appropriate for non-LGBT individuals. We are all born, live our lives and then we die. Doesn't matter who you are or what your sexual orientation is.

        • What you're describing in Leviticus is the Mosiac Law. The purpose of said law was to keep the ancient nation of Israel clean, morally and physically, and to provide a means for the Messiah. The Law also promoted health by having provisions for quarantining the ill, proper corpse disposal and designated toilet areas. Other things the Mosiac Law prohibited that were commonly practiced by surrounding nations were things like incest, child sacrifice, inquiring of the dead or otherwise communicating with a spir

          • At no point in Jesus ministry did he ever go around protesting and condemning others in a manner like this but rather his was always a positive message to those willing to listen.

            While I was with you for almost all of your comment, I'm not sure that the whitewashed sepulchres would completely agree with you on the above.

      • You should contemplate how it is that atheists know more about Christianity than Christians. But you won't because you fear what that path leads to.
    • we carry the equivalent of the entire world's computing power in 1965 in our pockets.

      Is that the equivalent of the entire world's computing power in 1965 in your pocket or are you just happy to see me?

      Sorry. Couldn't resist.

    • I'd call it 'The rise of superstition and pseudoscience', actually. More and more people are 'believing' in non-real things that can't ever be proven to exist scientifically. Include in this group the anti-vaxxers, too. I attribute this to decades of propaganda and concerted effort by organized religion, which could see they were progressively losing 'believers', and general disruptors promoting a general distrust in science in general -- which also goes hand-in-hand with the overall decline of basic intell
    • And of course, billions of people walk around believing in a magical super-being who will cast them into Hell for the most minor of imagined transgressions, like eating shellfish

      I think you've mixed up a bit of Judaism (not eating shellfish) with probably Christianity, but possibly some other religion. .It's fucking shameful that so many people believe in such a wide array of utter bullshit.

      yes

      • The old testament is still part of Christianity

        Don’t misunderstand why I have come. I did not come to abolish the law of Moses or the writings of the prophets. No, I came to accomplish their purpose. I tell you the truth, until heaven and earth disappear, not even the smallest detail of God’s law will disappear until its purpose is achieved. So if you ignore the least commandment and teach others to do the same, you will be called the least in the Kingdom of Heaven. But anyone who obeys God’s laws and teaches them will be called great in the Kingdom of Heaven. But I warn you—unless your righteousness is better than the righteousness of the teachers of religious law and the Pharisees, you will never enter the Kingdom of Heaven!

  • The dudes are hitting the salvia divinorum pretty hard it seems.
  • California, home of two legged fruits and vegetables.

  • That's just what those vegicidal vegans want you to think.
  • It would take probably the most powerful of our supercomputers to do it, and years of work, but I think we could create a working computer model of a plants' DNA within one. Where am I going with this? Simple: If you can model it in a computer with our current technology, then it's not likely to be 'conscious' or 'sentient' or anything even approaching those things.
    Of course I would be highly amused if it were true, only because it would spell an end to Vegans and Veganism, once and for all -- because the
    • I think we could create a working computer model of a plants' DNA within one.

      DNA by itself doesn't do anything. You need the entire cellular machine around it, and that's far beyond what we can do on a supercomputer. And even if you could model a single cell, it still doesn't tell you anything. The ability to model a single human neuron tells us almost nothing about human consciousness.

      • You're basically proving my point for me: we don't even understand enough about living cells to be able to create a virtual model of one in software, let alone define what 'consciousness' means, let alone how a so-called 'conscious mind' is 'conscious', yet we've got some crackpots who are claiming that "plants are conscious"? It's beyond preposterous, it's to a level of ridiculousness that I'd be tempted to say it's coming from organization(s) that are intentionally trying to disrupt our society/civilizati
        • let alone define what 'consciousness' means

          It's our word, so we can assign any reasonable meaning we want to. And you can define a word without fully understanding how it works. We can define things like "satellite" or "automobile" or "CPU" without understanding exactly how it works, or without defining a virtual model.

          Coming up with a definition is not the big problem here. The real problem is finding a definition that we all agree on, and that's pretty much impossible, no matter how much we claim to understand. Even if some genius creates a workin

  • In before someone identifies as an intelligent plant.

  • impressive abilities of plants to sense and react to their environments. While plants may curl their leaves in response to touch, grow faster when competitors are near and spring traps when prey wanders into them

    Yes, classic stimulus-response behaviour. But evolved, not learned.
    My phone "knows" when to alert me to an incoming call. It "talks" to me with its own language of beeps and adapts the screen brightness to ambient light levels. It tells me when it needs "feeding" and it even "knows" where it is.
    Sure, it can't move of its own volition (though sometimes I wonder!) but neither can plants. One could argue that it also grows old and dies, when it becomes unable to charge its battery, suffers a fatal fall or

  • Comment removed based on user account deletion
  • by nospam007 ( 722110 ) * on Friday July 05, 2019 @11:53AM (#58878090)

    So don't throw the idea away yet.

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