Richard, all I have written about basic truths is just a very brief introduction to the subject. I just have mentioned concisely the role that they play in mind, as mental filters, but their role is not limited to mind, since it extends to the function of science and to all human activities.
Indeed, all our basic truths (scientific, social, political, economic, cultural etc) are tightly connected to each other, support and protect each other by any attempt of external interference and altogether form a very powerful network, which protects mind and its function.
On one hand basic truths protect mind from falling apart and on the other hand are protected by it. Human mind itself uses its abilities to render its basic truths invisible and inaccessible: it does not let us locate our basic truths. As a consequence, since we cannot locate them, we can neither test them nor improve them.
The above view is confirmed if we take into account the witch-hunts and the persecutions to which were submitted those who expressed new, revolutionary scientific ideas, which collided with the respective basic trths that were dominant at the time. E.g. Galileo, Servet and many other scientists were condemned according to
religious laws,while they had expressed
scientific opinions (which,by the way, have been proved correct).
In addition, an argument which proves the resistance that mind poses to any attempt of mutation of its mental filters (basic truths) is the large periods that intervene from the wording of a new basic truth until it becomes accepted by the scientific community. E.g. It took 2 centuries in order for the basic truth that Copernicus expressed regarding universe to be accepted.
Nowadays, there still are basic truths which are obviously incompatible with their object, which are commonly accepted and are considered equal to verified knowledge, which have not yet been located, tested and improved.
This atitude, which has been common in every science and in every era, shows that basic truths are extremely well protected by a very powerful factor and are untouched by scientific review. The only factor that can accomplish such an achievement is mind itself.
E.g. If basic truths weren't protected so wel, everyone woud had realized by now that the basic truth of molecular biology, according to which molecules are the only active biological factor from which living organisms are consisted, is obviously incompatible with living organisms. Everyone, regardless of the science they serve, can easily ascertain that living organisms, except for molecules, are also consisted of electric and electromagnetic fileds and of intellectual faculties.
As far as the view that Quine expressed, I will try to express it in contemporary terms: the basic truth of a science is themental filter which determines which information will be able to access mind and which won't. E.g. in the case of the basic truth of molecular biology, the only information (opinions, ideas, data, knowledge, conclusions etc) that can pass by and reach mind are those that refer to molecules. On the contrary, the information that regard fields or intellectual faculties either are rejected by the basic truth- Procrustes or they are modified in order to obtain the "desirable" form.
All the information that pass by the basic truth that dominates on a science are unified and form a homogeneous total, which we can name scientific perception, program, scientific logics, optics, model, etc. All the ideas that form this total are interconnected and gathered around the central core, which is basic truth. The aggregation (scientific perception) is the "örgan" which conrols, coordinates and guides every scientific activity of the science.
In conclusion, the basic truth that supervses a given science is the creator of the respective scientific perception, which is the "organ" or the factor which guides every scientific activity. From the above relation is evident that the compatibiity as well as the effectiveness of a scientific perception is determined by the compatibiity and the effectiveness of the basic truth from which it has been produced.
To sum up, the presence of basic truths are absolutely necessary for the normal function of mind. What's more, it is essential for science, because a science becomes normal only f t is founded on a basic truth. A basic truth provides science with the essential coherence, homogeneity and effectveness. The experts who serve this science "speak the same language" and, regardless of their cultural, economic or social differences they think in the same way and they try to achieve the same goals.
The acceptance of a basic truth by every science is totally necessary for the normal function of science as well as for the normal function of mind. The handicap, which has been noted in every normal science and in every era, is the inability to locate and improve the dominant basic truth. The solution is very simple: experts must accept, respect and serve such an important scientific factor, as it is the basic truth that guides the science they serve, but they also must have all the knowledge that they need in order to be able to locate and improve this basic truth. Besides, scientists constantly try to improve all the factors that participate in their work. How can they leave the most important of them aside?
Moreover, basic truth can and should be improved because
1. It is not a verified knowledge, but an uncertain general opinion, which attempts to represent the basic elements of which the object of the science is consisted. The idea that any basic truth is complete and fully compatible with physical reality is a utopia, since reality is constantly proved "richer" than any view we have formed about it.
2. Possible improvement of a basic truth is equivalent to a scientific revolution (as Kuhn and others have realized). E.g. What happened when the classic basic truth regarding universe (according to which unverse consisted only of matter) was improved with the addition of fields?
Ps. Aetixintro, you are very kind

Thank you very much for the link to the article of Quine