Whenever a scientific theory enters a realm that cannot be falsified by any means it has trespassed into the realm of metaphysics whose claims cannot even proven wrong or right. This seems the case with the deviated direction of the string theory. The maths might be elegant, but its results cannot be scrutinized by experiment, it is incapable of making any prediction that can be nullified, it is like a high-priest ensuring you that there is another world in which the hell and heavens have many levels, a multi-verse of higher dimensions but to prove it you have to die first and visit it for yourself!
In the first chapter of his book " Fashion, Faith, and Fantasy", written on the basis of his lecture in Princeton, Roger Penrose is not daunted by such religious arguments: "if only the insiders are considered competent to make critical comments about the subject [of string theory], then the criticisms are likely to be limited to relatively technical issues, some of the broader aspects of criticism being, no doubt, significantly neglected. Since these lectures were given, there have been three highly critical accounts of string theory: 'Not Even Wrong' by Peter Woit, 'The Trouble with Physics' by Lee Smolin, and 'Farewell to Reality: How Fairytale Physics Betrays the Search for Scientific Truth' by Jim Baggott. Certainly, Woit and Smolin have had more direct experience than I have of the string-theory community and its over-fashionable status than I have. My own criticisms of string theory in The Road to Reality, in chapter 31 and parts of chapter 34, have also appeared in the meantime ..."
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