Augustus
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That is a really intresting point. I remember from watching a video that modern scientific research on genetics and biodiversity tends to focus work in the lab, but ignores the knowledge of local tribes in north america. It is also the case that scientific research (at least in the media) can tell us things we already know but haven't tested. It is wrong to dismiss what has gone before, but sorting out what could be useful and what isn't would be hard.
I also think that people overestimate the role of 'science' in many areas of life. What counts as a 'scientific' discovery? People invented the wheel without understanding the physics behind it, the science just tells people why it works, the person who invented it just knew that it did work.
Often things are discovered by accident or based on hunches and instincts. Penicillin was discovered by accident, many other things were created by people who just knew that something would work, rather than why it would work.
I once watched a programme about modern engineers trying to create medieval siege weapons, such as trebuchets. With all their modern equipment, computer modelling and scientific knowledge, they couldn't create a trebuchet that was even a quarter as good as the ones built 1000 years ago. Alternatively, no one can build a violin as good a a Stradivarius, and no one even knows what his secret was. People discover things through experience, trial and error and this knowledge is passed down. Practical knowledge was transmitted through things such as guilds based on practice rather than theory - the why things work is much less important than the fact that they do work.
Dismissing knowledge gained through experience as intrinsically 'inferior' to scientific knowledge is wrong, as is the idea that we have all of these great modern things because of 'science'.
The question as to whether social science can ever be as good as natural science in terms of reliability is an important one. For social science to be accurate, it means that consciousness can be scientifically studied as an objective phenemenoa rather than a subjective experience. (So it's closely related to 'scientific materialism' in that regard).
I'm going to agree with you that there is often an irrational component to the belief in the superiority of science, but in so far as the superiority of the method can be established because it is a superior way of having knowledge which we can use to make the world serve our interests and our needs. this does not mean it is infallible however, and that is something that needs to be taken into account.
In many situations when we learn something new (watch TV news, read an academic article, learn from experience, etc.) we pick up both knowledge and anti-knowledge.
There is probably an actual word for anti-knowledge but I don't know it so I'm going to use this phrase. Knowledge is when we learn something true/useful anti knowledge is when we learn something that is wrong/harmful under the mistaken impression that it is in fact knowledge.
Watch 1 hour of breaking news on a 24 hour news station about a major terrorist attack. You will pick up so much false information and speculation that your understanding will probably be less than that of someone who is simply told 'there has been a major terrorist attack'. Time is a very good filter of anti-knowledge; someone who reads every newspaper article the day after the terrorist attack, will know less that somebody who reads a single newspaper article 1 month after the terrorist attack.
So in order of utility we have:
1. Knowledge
2. Know nothing
3. Anti-knowledge
For the sake of brevity, I'm just going to focus on a generalised concept of anti-knowledge that is worse than knowing nothing.
A field of enquiry needs to be evaluated not just on its successes, with its failures being discounted as errors and mistakes that 'we'll get right next time', it need to be evaluated in terms of its record of creating knowledge versus anti-knowledge. We lack the cognitive skills to identify the differences until the harms become apparent so we have to evaluate in a positive sense rather than a normative one.
I would argue that many aspects of social science (and some other areas or 'science) generate such an amount of anti-knowledge that it is frequently better to know nothing. Economics is a good example of this. There are even examples of economists blaming real life for not acting in the way that their model had suggest it should. Reality was wrong, not their theory!
In many of these fields a practitioner who relies on judgement, experience and instinct ("unscientific') is far better informed than an 'academic expert' who relies on "scientific" models and theories. The "expert" is often less informed even than the man on the street who is not blinded to reality by normative theories and explanations.
Never mind being as reliable as natural science, I'm not convinced social science can be as reliable as knowing nothing.