We’ve all bought and enjoyed books called ‘Optical Illusions’. We all love optical illusions. But that’s not what they should call the book. They should call them ‘Brain Failures’. Because that what it is: a complete failure of human perception. All it takes is a few clever sketches and our brains can’t figure it out.
Also, just because we can’t expect to be free of bias doesn’t mean that the bias is “proper functioning” of the hardware. An expected failure, perhaps, but still a failure.
I make a finer distinction of “failure” as something that’s inefficient for it’s clear purpose. E.g. Laryngeal nerve of the giraffe. Evolution will do that on occasion. Sensory interpretations that optical illusions are based on are often optimal for the environment, and are a complement to the power of evolution if anything. Viewing something that is optimal as a failure seems like wishful thinking (though I suspect this is more of a misunderstanding of neurobiology).
Viewing something that is optimal as a failure seems like wishful thinking.
Actually, that seems kind of fair. Something is a “failure to X” if it doesn’t achieve X; something is a “failure” if it doesn’t achieve some implicit goal. You can rhetorically relabel something a “failure” by changing the context.
Vision works well in our usual habitat, so we should expect it to break down in some corner cases that we can construct: agreed. For me to argue further would be to argue the meaning of “failure” in this context, when I’m pretty sure I actually agree with you on all of the substance of our posts.
For me to argue further would be to argue the meaning of “failure” in this context, when I’m pretty sure I actually agree with you on all of the substance of our posts.
I really do not want to argue about semantics either, but our agreed interpretation makes Niel’s statement equivalent to “our visual system is not optimal for non-ancestral environments”, which is highly uninteresting. I think the Dawkin’s larengyal nerve example is much more interesting in this sense, since it points out body designs do not come from a sane Creator, at least in some instances (which is enough for his point).
Since we do not live in the ancestral environment now, I think the quotation could be just underlining how we should viscerally know our brain is going to output sub-optimal crud given certain inputs. Upvoted original.
I think it’s another way of putting it, though IIRC the biases are not always explicitly prior probabilities, they could just be a way the algorithm is constructed. Choosing the specific construct is acting on a prior.
How do you define “illusion”? I think an illusion is a type of brain failure. An optical illusion is even more specific. Therefore, I think the term is wholly appropriate — and “brain failure”, while not at all inappropriate, is just unnecessarily vague.
Neil deGrasse Tyson
Transcribed from http://www.youtube.com/watch?v=CAD25s53wmE
Disagree, at least in some instances. Many of these are just results of optimizing for normal environment.
There is a theorem in machine learning (blanking on the name) that says any “learner” will have to be biased in some sense.
The No Free Lunch Theorem.
Also, just because we can’t expect to be free of bias doesn’t mean that the bias is “proper functioning” of the hardware. An expected failure, perhaps, but still a failure.
I make a finer distinction of “failure” as something that’s inefficient for it’s clear purpose. E.g. Laryngeal nerve of the giraffe. Evolution will do that on occasion. Sensory interpretations that optical illusions are based on are often optimal for the environment, and are a complement to the power of evolution if anything. Viewing something that is optimal as a failure seems like wishful thinking (though I suspect this is more of a misunderstanding of neurobiology).
Actually, that seems kind of fair. Something is a “failure to X” if it doesn’t achieve X; something is a “failure” if it doesn’t achieve some implicit goal. You can rhetorically relabel something a “failure” by changing the context.
Vision works well in our usual habitat, so we should expect it to break down in some corner cases that we can construct: agreed. For me to argue further would be to argue the meaning of “failure” in this context, when I’m pretty sure I actually agree with you on all of the substance of our posts.
I really do not want to argue about semantics either, but our agreed interpretation makes Niel’s statement equivalent to “our visual system is not optimal for non-ancestral environments”, which is highly uninteresting. I think the Dawkin’s larengyal nerve example is much more interesting in this sense, since it points out body designs do not come from a sane Creator, at least in some instances (which is enough for his point).
Since we do not live in the ancestral environment now, I think the quotation could be just underlining how we should viscerally know our brain is going to output sub-optimal crud given certain inputs. Upvoted original.
I don’t understand. Does that mean they have priors?
I think it’s another way of putting it, though IIRC the biases are not always explicitly prior probabilities, they could just be a way the algorithm is constructed. Choosing the specific construct is acting on a prior.
How do you define “illusion”? I think an illusion is a type of brain failure. An optical illusion is even more specific. Therefore, I think the term is wholly appropriate — and “brain failure”, while not at all inappropriate, is just unnecessarily vague.