2
   

veracity of evolution

 
 
salima
 
  1  
Reply Thu 27 Aug, 2009 01:11 pm
@Aedes,
Aedes;86063 wrote:
Isn't terminology like this just a matter of inclusion and exclusion criteria? Based on things we recognize as life, we can list certain absolute criteria. By similar measures, we can discriminate solids from gases, and we can discriminate stars from planets.

We know that the main unit of life is the single cell. Why? Because the simplest life forms are single cells, and multicellular organisms develop out of a single cell. The two main divisions of cell are prokaryotic and eukaryotic, and these are similar in their use of DNA as genetic material, the relationship between DNA / RNA / proteins, the derivation of energy from simple carbon-based substrates, and the delimitation of a cell by phospholipid bilayers.

Sure, there is more to it than that, but we can start with a collection of features that all life has, that no life lacks, and that no non-life has. Viruses are a special case that is difficult to categorize into "life" vs "non-life", but can be illustrative in their own right.

A biologist is interested in the same question. But I think the biological mindset is to look as life as a structural thing, rather than an ethereal thing. Don't get me wrong, I think life is mystifying and is of basic metaphysical interest -- but I recognize this interpretation to be a derivative of my interest in it and not necessarily a feature of life per se.


i never knew that about viruses-awesome!

i always saw everything as being alive-i think maybe what most people distinguish as being alive are actually organisms? cells are doing something that rocks dont do as far as we know. but maybe we havent found out rocks are doing something else. maybe living is what some things do rather than something in them that is peculiar to the process of life. and we may find out that everything does something-whether we have identified it or not. and the thing they are doing is living. in other words, why say living or not living instead of simply being or existing?
odenskrigare
 
  1  
Reply Thu 27 Aug, 2009 01:16 pm
@odenskrigare,
hey guys btw

Biologists on the Verge of Creating New Form of Life | Wired Science | Wired.com
0 Replies
 
LWSleeth
 
  1  
Reply Thu 27 Aug, 2009 01:35 pm
@odenskrigare,
odenskrigare;86050 wrote:
but you used "proof" and "science" together which makes me think the Dunning-Kruger effect is at work here

my advice would be to stop flattering yourself and lrn2biology


God you are arrogant; not even in grad school yet and already you've got it all figured out . . . I at least worked through a few decades worth of education before deciding nothing is so certain as you seem to imagine (and you accuse ME of the Dunning-Kruger effect!).

However, I am clear as a bell about the difference between a logic proof (tautologies), and a scientific "proof" (basically, the ability for all to observe). It is common to use the term "proof" as it applies to a specific setting (such as, how the standard of proof is unique in a courtroom). You are merely slipping and sliding away from directly providing evidence we can all observe of what caused organism-building genetic change.

If you are like every other E-theory believer I've debated who won't give an inch, all I will ever get from you is one "logical" possibility after another, and absolutely nothing observable that makes mechanics/randomness the winner.


odenskrigare;86050 wrote:
except that evolution isn't random, just the mutation. mutation makes lots of recommendations, some of them are harmful, most of them are benign, and a select few are better. these are approved by the environment. not random


All theory! How do you know organism-building mutation was random??? Furthermore, you also don't know that selection for fitness would get so creative as to build complex organ systems. It is another assumption, never confirmed by observation.

Why not admit it, since no one can possibly know what caused organism-building genetic changes, it could very well be, for example, that the universe is conscious overall somehow, and that had an evolutive influence on genetic change during life's development.

The mechanist/physicalist/scientism-believer group know best how to study mechanics, and so that is what their God looks like. Forget that mechanics has never showed itself to have the kind of creativity found behind life, believers want a mechanistic God so badly they are willing to overlook every flaw and gap in their theories, and bash anybody who dares to look for "something more."

I understand why the thinking person gets tired of religious ignorance, especially when fanatics try to push their beliefs on others (or into the education system). But I feel just as angry at science "believers" who go around judging everything by scientific standards as if that's the only epistemology that reveals knowledge. The issue of what created the universe is not settled, even though dogmatists on all sides like to act like it is.
richrf
 
  1  
Reply Thu 27 Aug, 2009 01:52 pm
@Aedes,
Aedes;86063 wrote:
A biologist is interested in the same question. But I think the biological mindset is to look as life as a structural thing, rather than an ethereal thing. Don't get me wrong, I think life is mystifying and is of basic metaphysical interest -- but I recognize this interpretation to be a derivative of my interest in it and not necessarily a feature of life per se.


Hi Paul,

I agree. Everyone is approaching it from their own field of interest. When someone ask a biologist what is the main unit of life, the answer may be the cell.

When someone asks a someone studying metaphysics, the answer may be consciousness. I think we are talking about the same thing, since I do not see how it is possible to separate that which is conscious from that which it is conscious of.

Many quantum physicists have struggled with precisely this problem. Some like Bohr or Dirac thought that it was beyond the realm of science and the mathematics should be accepted as is.

Others, such as Einstein, Bohm and Bell, sought to look for a meaning behind the mathematics and, in the case of Bohm, presented a metaphysical interpretation which he called the Implicate Order, which rolls consciousness and matter into and out of an Order as might waves that form a hologram. It is fascinating reading.

So, we all start from where we start and then we study, explore, and exchange views. This is fine. However, it gets to be a problem when an evangelist of any type begins to ridicule the efforts of the other. I realize that this goes on all the time, but it does create some roadblocks to discussion.

Rich
0 Replies
 
Aedes
 
  1  
Reply Thu 27 Aug, 2009 02:15 pm
@salima,
salima;86073 wrote:
i never knew that about viruses-awesome!
Viruses are not truly alive in the same sense that cells are. They're much simpler, have only a few genes, and are without exception are dependent on invasion of host cells (though this is true of a wide variety of other organisms).

Viruses have genomes that may be double stranded DNA , single stranded DNA, double stranded RNA, or single stranded RNA. All other life forms, from bacteria on up, only have double stranded DNA. Viruses depend on the host cell for gene expression and for metabolism.

They're best thought of as subcellular parasites. It's quite likely that they represent an independent emergence of a life-form, or perhaps several emergences, but because they arose in an environment with other cellular life the niche they filled was parasitic.
0 Replies
 
odenskrigare
 
  1  
Reply Thu 27 Aug, 2009 02:17 pm
@LWSleeth,
LWSleeth;86080 wrote:
God you are arrogant; not even in grad school yet and already you've got it all figured out


yeah well yeah ya know man a lot of young scientists brashly cling to the mainstream theory of evolution but as they get older they come to realize it is truly deficient

...

are you serious

LWSleeth;86080 wrote:
. . . I at least worked through a few decades worth of education before deciding nothing is so certain as you seem to imagine (and you accuse ME of the Dunning-Kruger effect!)


that unpleasant sound you hear is thousands of biologists laughing at you

LWSleeth;86080 wrote:
However, I am clear as a bell about the difference between a logic proof (tautologies)


ba ha ha ha are you serious a tautology is a logical statement that can never be false like p or ~p and is a special case in formal logic, I'd take you more seriously if you didn't horribly mangle such basic terminology

get off the stage, your act reeks

LWSleeth;86080 wrote:
and a scientific "proof" (basically, the ability for all to observe). It is common to use the term "proof" as it applies to a specific setting (such as, how the standard of proof is unique in a courtroom). You are merely slipping and sliding away from directly providing evidence we can all observe of what caused organism-building genetic change


clarify organism-building genetic change and how this is different from vanilla genetic change

LWSleeth;86080 wrote:
If you are like every other E-theory believer I've debated who won't give an inch, all I will ever get from you is one "logical" possibility after another, and absolutely nothing observable that makes mechanics/randomness the winner


there is no falsification before emergence of a better theory

submit something less wrong and I'll gladly take up the sword for it

LWSleeth;86080 wrote:
All theory! How do you know organism-building mutation was random???


cuz what else would it be? planned? by who?

LWSleeth;86080 wrote:
Furthermore, you also don't know that selection for fitness would get so creative as to build complex organ systems. It is another assumption, never confirmed by observation


http://www.healthstones.com/dinosaurdata/a/archaeopteryx/archaeopteryx.jpg

half bird half dinosaur morphologically this seems pretty compelling

LWSleeth;86080 wrote:
Why not admit it, since no one can possibly know what caused organism-building genetic changes, it could very well be, for example, that the universe is conscious overall somehow, and that had an evolutive influence on genetic change during life's development


great now tell me how you can falsify your claim that the Universe is conscious and how it has more evidence for it than evolution (besides question-begging such as "mechanics just CAN'T produce creativity")

yeah hey damn attributing the development of life to mutation and natural selection is UNSCIENTIFIC but "hey maaaaan like the Universe is conscious maaaaaan *click click* *bubble bubble bubble* *ahhhhhhh*" now that's empirically sound

LWSleeth;86080 wrote:
Forget that mechanics has never showed itself to have the kind of creativity found behind life


evolution is a slow, shoddy satisficing algorithm you can't be serious

LWSleeth;86080 wrote:
believers want a mechanistic God so badly they are willing to overlook every flaw and gap in their theories, and bash anybody who dares to look for "something more."


I'd love to believe I was created by purple elf poop. however there is no evidence for that

LWSleeth;86080 wrote:
I understand why the thinking person gets tired of religious ignorance, especially when fanatics try to push their beliefs on others (or into the education system)


evolution is not a religion, sorry, but you are right that more and more people are turning to the reality-based lifestyle as the 21st century picks up steam and there's nothing you can do about it

http://i29.tinypic.com/147f5y.png

LWSleeth;86080 wrote:
But I feel just as angry at science "believers" who go around judging everything by scientific standards as if that's the only epistemology that reveals knowledge. The issue of what created the universe is not settled, even though dogmatists on all sides like to act like it is.


yes you're going to pretend to be fair and balanced again but really you're only being moderate for moderation's sake which is rather silly since we've got background radiation and red shift and the creationists don't

---------- Post added 08-27-2009 at 04:19 PM ----------

richrf;86082 wrote:
in the case of Bohm, presented a metaphysical interpretation which he called the Implicate Order, which rolls consciousness and matter into and out of an Order as might waves that form a hologram. It is fascinating reading


there's a reason the Bohm interpretation isn't popular
Aedes
 
  1  
Reply Thu 27 Aug, 2009 02:23 pm
@odenskrigare,
odenskrigare;86050 wrote:
evolution isn't random, just the mutation
Not even mutations are 100% random. Species with high mortality rates tend to have short generation times, which predisposes to mutagenesis -- this favors evolutionary development in species that are under environmental stress. This has been shown quite convincingly among rodents near Chernobyl. Not all chromosomal sites and not all base pairs have equivalent risk of mutation. Not all genes are equivalently conserved. Not all species have equivalent DNA proofreading mechanisms. Not all mutagenic conditions (be it UV, chemical, cell turnover, whatever) result in equivalent kinds of polymorphism.

So this all contradicts the idea that mutations happen with complete randomness (and by this I mean statistical lack of predictability). Lack of randomness doesn't mean that God is doing it.

It just supports the argument that we didn't simply arise out of the muck -- every "next step" in evolution was probably quite probable, quite likely, and not random at all. But there have been so many intermediate steps between the beginning and now that the result could never have been predicted.
0 Replies
 
odenskrigare
 
  1  
Reply Thu 27 Aug, 2009 02:28 pm
@odenskrigare,
what I meant by random was not uniform distribution of mutation, but more not for any given purpose

like when a base pair gets added or deleted, the event is not specifically for any purpose per se, although it might come in handy: "undirected" would be a better word than "random"

and yes of course evolution as a whole isn't undirected, that's where you get stuck with "tornado in a junkyard" analogies. natural selection is what provides direction
0 Replies
 
Aedes
 
  1  
Reply Thu 27 Aug, 2009 02:36 pm
@odenskrigare,
I know you know this (from having read your posts) but natural selection is not all that provides direction. Selection will lead to the most rapid population genetic changes, and when you observe genetic "sweeps" (i.e. rapid changes in allele frequency) it's usually a sign of selective pressure.

But genetic drift, nonselective mating, founder effects, isolated populations, small populations, etc, ALL cause derangements in Hardy-Weinberg equilibrium predictions, so population genetics can dramatically change over time even in the absence of selection.
0 Replies
 
odenskrigare
 
  1  
Reply Thu 27 Aug, 2009 02:39 pm
@odenskrigare,
one could argue that these effects are kinds of selection, in the broadest sense (i.e., mechanisms operating over mutation), but yeah none of them require you to invoke a ghost so we coo'
0 Replies
 
richrf
 
  1  
Reply Thu 27 Aug, 2009 02:46 pm
@odenskrigare,
odenskrigare;86086 wrote:
there's a reason the Bohm interpretation isn't popular


I would be interested in the reason.

Rich

And what would that reason be.

John Stewart Bell, whose papers are among those most often referenced in quantum physics papers, strongly embraced the de Broglie-Bohm model, and offered up reasons why. Bohm's model handily explains the very weird results of Wheeler Delayed-Choice experiment.

John Bell on de Broglie Bohm Delayed Choice


Copenhagen is embraced for the same reason evolution is embraced. People want jobs, and there is no better way to get a job than embracing the notions of the status quo, and no faster way to lose a job than to challenge accepted beliefs. After all, scientists are just human.

Rich
Aedes
 
  1  
Reply Thu 27 Aug, 2009 02:47 pm
@odenskrigare,
Well, it's a statistical selection rather than a fitness selection, I guess that's the main difference, but so long as genetic populations are finite this will always happen.

I think these points are important to emphasize, because very very very few people who haven't spent much time studying science truly understand how evolutionary biology has changed since Darwin -- Darwin who was born more than 200 years ago now.

And I find it impossible to have meaningful conversations about evolution if we're still hung up on finch beaks. Darwin's work constitutes one of the most revolutionary hypotheses in scientific history. But to talk meaningfully about evolution now means that one needs to have familiarity with population genetics, molecular biology, developmental biology, and (increasingly) epigenetics.

---------- Post added 08-27-2009 at 04:49 PM ----------

richrf;86094 wrote:
no faster way to lose a job than to challenge accepted beliefs
Oh I doubt that -- every scientist wants to lead a revolution. But science happens piecemeal. You can't just take on evolution any more than you can take on gravity. A scientist who blares contradictory trumpets is being careless, though, if he hasn't done the legwork to make his case.
0 Replies
 
odenskrigare
 
  1  
Reply Thu 27 Aug, 2009 02:52 pm
@richrf,
richrf;86094 wrote:
I would be interested in the reason


the metaphysical part isn't falsifiable

---------- Post added 08-27-2009 at 04:55 PM ----------

Aedes;86095 wrote:
Oh I doubt that -- every scientist wants to lead a revolution. But science happens piecemeal. You can't just take on evolution any more than you can take on gravity. A scientist who blares contradictory trumpets is being careless, though, if he hasn't done the legwork to make his case.


rich seems to think we just like sit at desks and stare intensely at meticulously lined up pencils while a wall clock breaks a dead silence at precise one second intervals and we just kind of sit there clenching our rectums or something

in truth I think most of us are regular Leif Erikssons and it strikes me odd that rich who exalts a culture with strong conformist, authoritarian tendencies going back to the Qin dynasty rips into "the scientific establishment" for being rigid and stagnant when the truth is that science has always been extremely disruptive to conservative elements in society

projection anyone?
richrf
 
  1  
Reply Thu 27 Aug, 2009 03:06 pm
@odenskrigare,
odenskrigare;86099 wrote:
the metaphysical part isn't falsifiable


It absolutely is. One just has to think of an experiment that would falsify the de Broglie wave/particle interpretation. So far, no one can. It actually does a magnificent job of explain delayed-choice as well as double-slit. However, it does mean that the are non-local effects, which is no matter since the Bell Inequality and subsequent experiments have already confirmed this.

On the other hand, anything about what happened millions of years ago, is not falsifiable, unless you can figure out how to re-create the conditions.

Rich
odenskrigare
 
  1  
Reply Thu 27 Aug, 2009 03:14 pm
@richrf,
richrf;86102 wrote:
It absolutely is. One just has to think of an experiment that would falsify the de Broglie wave/particle interpretation. So far, no one can. It actually does a magnificent job of explain delayed-choice as well as double-slit. However, it does mean that the are non-local effects, which is no matter since the Bell Inequality and subsequent experiments have already confirmed this


the metaphysical part is by nature

and none of this other stuff requires a ghost hope you're clear on that

richrf;86102 wrote:
On the other hand, anything about what happened millions of years ago, is not falsifiable, unless you can figure out how to re-create the conditions


Biologists on the Verge of Creating New Form of Life | Wired Science | Wired.com

recreating the conditions

there's even a video for chrissake
richrf
 
  1  
Reply Thu 27 Aug, 2009 03:18 pm
@odenskrigare,
odenskrigare;86104 wrote:
recreating the conditions

there's even a video for chrissake


And you want me to take this kind of stuff seriously.

Let me suggest this. When you are able to re-create conditions as they existed 5 minutes ago, much less millions of years ago, get back to me.

Rich
odenskrigare
 
  1  
Reply Thu 27 Aug, 2009 03:28 pm
@richrf,
richrf;86105 wrote:
And you want me to take this kind of stuff seriously


yeah cuz we're on the brink of creating new life similar to what you might have expected from primordial Earth gg

that's tangible rich

it's more worth taking seriously than "my view of the universe is alive"

---------- Post added 08-27-2009 at 05:29 PM ----------

btw are you saying that the past five minutes didn't happen cuz we can't recreate them

I was watching a video of Boxxy and there is concrete evidence that the last five minutes happened
0 Replies
 
Pathfinder
 
  1  
Reply Thu 27 Aug, 2009 04:51 pm
@odenskrigare,
for the sake of entertaining the possibility of evolution, let me ask what the biologists here think is the difference between being dead today and what dead was ten million years ago?

What does it mean for something to be dead, and has evolution caused any change to that dynamic over the last ten million years?
odenskrigare
 
  1  
Reply Thu 27 Aug, 2009 04:56 pm
@odenskrigare,
it's still pretty much the same
Aedes
 
  1  
Reply Thu 27 Aug, 2009 06:47 pm
@Pathfinder,
Pathfinder;86126 wrote:
What does it mean for something to be dead, and has evolution caused any change to that dynamic over the last ten million years?
Different organisms are dying. Different scavengers eat the dead things. Different microbes rot the dead things. Same cake, different icing -- or maybe it's the other way around. We'll all be natural gas a few mil years from now; and some seem like they're halfway there already.
0 Replies
 
 

Related Topics

 
Copyright © 2024 MadLab, LLC :: Terms of Service :: Privacy Policy :: Page generated in 0.07 seconds on 12/23/2024 at 07:52:19