Editing Tachyon (section)

==== Reinterpretation principle ====
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The '''reinterpretation principle'''<ref name="Feinberg 1967-1969" /><ref name="sudarshan62" /><ref name="Gron" /> asserts that a tachyon sent ''back'' in time can always be ''reinterpreted'' as a tachyon traveling ''forward'' in time, because observers cannot distinguish between the emission and absorption of tachyons. The attempt to ''detect'' a tachyon ''from'' the future (and violate causality) would actually ''create'' the same tachyon and send it ''forward'' in time (which is causal).

However, this principle is not widely accepted as resolving the paradoxes.<ref name="Benford" /><ref name="Gron" /><ref name="Recami" /> Instead, what would be required to avoid paradoxes is that, unlike any known particle, tachyons do not interact in any way and can never be detected or observed, because otherwise a tachyon beam could be modulated and used to create an anti-telephone<ref name="Benford" /> or a "logically pernicious self-inhibitor".<ref name="Fitzgerald" /> All forms of energy are positted to interact at least gravitationally, and many authors state that superluminal propagation in Lorentz invariant theories always leads to causal paradoxes.<ref name="Barcelo" /><ref name="Arkani" />