Comment String theory and falsifiability (Score 1) 16
Physics has used indirect testing for many years, and I don't think anyone expected string theory to be any different.
There are research papers that detail specific properties that must be present in any string theory-based model of gravity, for example. If we find, in our efforts to study quantum gravity, that those properties can't hold, then string theory cannot be correct. Not just a specific string theory, ANY string theory at all.
Any string theory that requires a supersymmetry that is reachable by the LHC once it gets updated will be falsified within a very short space of time. If we persist in not seeing supersymmetry after this further round of updates (and we've already had several to improve luminosity), then none of the string theories involved can be correct. They have to be false.
None of these allowing string theory would prove string theory "true", but if any are false then string theory cannot be true. If ALL of them permit string theory, then whether or not string theory describes anything real, the maths that has been done must nonetheless describe real things.