How do I not understand what is useful information? Do I not understand what is a science, a system or a logic model - where very strong reasoning can be used to describe in a consistent way the relations and interactions -- resulting in strongly supported truths about the systems... ?
Your other statement must stand for your own account... Could you enlighten me as to examples of philosophy, political theory and economic theory examples - which are useless drivel -- and please not just one example - but you could categorize so that it reflects your 90% claim. Otherwise, I would assume you are generalizing, lying or just clueless.
you confuse pseudo science with the empirically supported science. You think qualitative analysis is complete and rigorous, you think that just because you think a model is logical then it must be sound.
Philosophy, political science, and economics have no external objective yardsticks to measure them with. There are no correct or incorrect answers because it all boils down to human psychology which cannot be quantified. Small kernels of interesting 'truth', but they are not sciences by any stretch. You can blather on all you want about this or that theory but if I simply disagree with one assumption then your argument is lost.
Take Marxism, whole treatises written on it, but the Labor Theory of Value can be discredited in about one paragraph, and so all the rest is a useless waste of time. The type of mental masterbation I'm talking about.
Philosophy is simply a matter of taste, nothing else. Constructing self consistent systems is for people who can debate amongst themsleves, but they are otherwise useless as for a description of nature.
Economists cannot give accurate 3 month forecasts with all their machinery. Always backward looking historians. Samuelson has been discredited, Keynes shown to be folly, it is easy to show that supply and demand curves are bogus, etc. There is but one principle that has shown useful for wealth creation- freedom, a few concepts that ring true like currency, rule of law, hard work. Outside of that there isn't much to go on that's really useful when you have live in the real world.