Physical theory a pre-requisite for asking questions?? Should a physical theory be a pre-requisite for asking questions in modern physics??? Both of my previous threads were locked and received lot of criticism because i asked regardind a space-craft moving faster than c, I would just like to point out that there is a mathematical description of a universe in which particles travel faster than c, and also i would like to point out the "THE BLACK SWAN EFFECT", so if there is a new phenomenon, should we rather not examine it because "THERE IS NO PHYSICAL THEORY TO EXPLAIN IT" or should we develop new theory to explain this phenomenon. Should we not encourage new theories just because they lack proof or due to other reasons! William cowper said that: "Absence of proof is not proof of absence" I also want to know "Is discussing of physical theories which do not have any credible evidence like String theory or Quantum theory of Gravity allowable in this forum??" If yes, i really dont get the difference between why asking question which are not supported by any physical theories not allowed while physical theories which do not have any experimental backing being allowed to discuss???