Faster Than Light?
It is widely believed that relativity -- both special and general -- requires that no physical signal travel at a speed faster than that of light. For instance, the assumption that there could be superluminal signals in relativity gives rise to well-known paradoxes. We suggest that this situation is not nearly as dire as it appears at first sight. Indeed, we shall argue that relativity is virtually as viable and self-consistent as a physical theory in the presence of superluminal signals as it is with such signals excluded.