String Theory Taken to Its Logical Conclusion

Proponents of the controversial theory have taken to arguing that their theory is so elegant that it should require no experimental verification:

This year, debates in physics circles took a worrying turn. Faced with difficulties in applying fundamental theories to the observed Universe, some researchers called for a change in how theoretical physics is done. They began to argue — explicitly — that if a theory is sufficiently elegant and explanatory, it need not be tested experimentally, breaking with centuries of philosophical tradition of defining scientific knowledge as empirical. We disagree. As the philosopher of science Karl Popper argued: a theory must be falsifiable to be scientific.

I agree wholeheartedly.

BTW, that sound you hear is Richard Feynman spinning in his grave.

Chief among the 'elegance will suffice' advocates are some string theorists. Because string theory is supposedly the 'only game in town' capable of unifying the four fundamental forces, they believe that it must contain a grain of truth even though it relies on extra dimensions that we can never observe. Some cosmologists, too, are seeking to abandon experimental verification of grand hypotheses that invoke imperceptible domains such as the kaleidoscopic multiverse (comprising myriad universes), the 'many worlds' version of quantum reality (in which observations spawn parallel branches of reality) and pre-Big Bang concepts.

These unprovable hypotheses are quite different from those that relate directly to the real world and that are testable through observations — such as the standard model of particle physics and the existence of dark matter and dark energy. As we see it, theoretical physics risks becoming a no-man's-land between mathematics, physics and philosophy that does not truly meet the requirements of any.

My knowledge of string theory is minimal, coming from my (PhD in physics) brother who mocks it for its lack ability to make meaningful predictions. (There's also the representation in pop culture in Big Bang Theory, but I do not take my lead from such)

On the other hand, I know bullsh%$ when I hear it, and the idea that an unprovable theory should be accepted on the basis of its aesthetics is definitely bovine scatology.

This is an indictment of those string theorists who are calling for its acceptance on pure faith, but it is more than that: It is a searing indictment of string theory by those who are its greatest proponents.

H/T DC at the Stellar Parthenon BBS.