Peter Holmes wrote: ↑Tue Feb 01, 2022 8:08 am
Veritas Aequitas wrote: ↑Tue Feb 01, 2022 7:38 am
Peter Holmes wrote: ↑Sun Jan 30, 2022 10:33 am
Thanks. You say the idea of a dog physically exists in a brain. If so, it must be describable in physical terms. So please describe the idea of a dog in a brain. Just saying it exists in a brain as a brain state doesn't do the job. It says nothing useful.
Then, perhaps you can do the same thing for the idea of an idea, which presumably you also think exists physically as a brain state. And how about the idea of truth or identity or beauty, and so on. All these supposed abstract things that you think exist physically as brain states.
I am very directly tackling the ontological issue, by pointing out the way we mistake what we say about things for the way things are - which includes the way they are in our brains.
The 'idea' of a 'dog' does exists physically in a brain and that is represented by the respective neural activities in the person brain.
This pattern of brain activities
in general [not specific & with exceptions] is universal for all humans when based on after having seen a real dog or an accepted image of what a dog is.
Note, a linguistic concept of a dog without the experience is not of the same neural circuit pattern.
However, there is also no absolutely independent physically real dog existing out there as claimed by the Philosophical Realists.
https://en.wikipedia.org/wiki/Philosophical_realism
i.e. as Rorty there is no independent dog out there that mirror [to be corresponded with] our ideas of a dog out there.
What is supposed a real dog existing independently out there is merely an emergent reality from which the cluster of human molecules [with self-awareness] dances with the clusters of molecules from the stardusts via evolution where all of these elements are also emergences.
The problem is Philosophical Realism
-PR- [arose psychologically out of an existential crisis] is that PR triggered an very erroneous assumption there is something pre-existing awaiting human to mirror it.
I'll leave aside your bonkers anti-realism: there are no real dogs anyway.
You are being delusional in insisting there is a real dog that is absolutely independent of the human conditions as per Philosophical Realism.
Please describe what you claim is the idea of a dog in a brain. Saying it's 'represented by the respective neural activities' explains nothing. That's just mumbling the mantra - like saying it's a brain state. 'Of course ideas exist in brains. Just look at those synapses firing.'
When neuro-scientists scan brains, do you think they say: 'Oh, look, there's an idea - and that crackle was an intention - oh, and I think I just spotted a meaning'?
Your counter re the last statement exposed your very lack of and is insulting your own intelligence!
Note this image of the number 6.
If this number is computerized, the number 6 will be fixed on the respective pixels.
The other numbers will be represented by other fixed patterns of pixel.
The brain works somewhat similarly to a computer.
Thus the image of certain things will be represented by the activities of certain fixed patterns of neurons firings from different
parts of the brain.
It is the same with ideas and concepts in the brain, they are represented by certain general patterns of neurons is the specific different parts of the brain.
Therefore the image or idea of a dog will be represented by activities of the specific parts of the brain that is universal in all humans.
However note the image and ideas of things are not represented by the same specific neurons but rather in the various specific parts of the brain.
Theoretically, when neuroscientists have the technology to scan the brain more precisely when a person have an idea of a dog, they will find the same pattern of neural activities in the same parts in all humans.
At present, using fMRI neuroscientists are able to trace the certain parts of the brain in relation to their mental activities. However with fMRI they can only identify crudely which parts of the brain but not in greater details.
If the brain is analogically the Earth, they can only track the activities to the respective Continents and countries, but not down to which States, district, towns, streets and individual house.
Whilst someday [progress of the
human connectome project] neuroscientists will be able to track the representation of an idea, image or concepts to the more specific parts of the brain.
However because the brain is so complex, i.e. of average 100 billion of neurons each with up to 10,000 synapse, they will not be able to reproduce the same image if they were to trigger those parts due to the complexity.
But the principle is, an idea or image of a dog in the brain is represented by a specific brain states that is represented by a set of neural activities in certain specific parts of the brain which is the same for all humans who have a idea of a dog [as defined].
Do you deny this?