It is if you want it to be.

Does ol' Werner's Principle apply to time? I mean, I can understand why you can't know mass and location at the same time, but what about time? Is time another aspect of mass and energy? If so, can we undo mass/energy conversion, or do energy/time conversions?

(I have a little list of people I'd like to convert from mass to energy, but chemically, not on a nuclear level.)