Information flowing both backward and forward through time is obviously useless to us since we perceive and move in only one direction. It’s not obviously nonsense. Our perception moves forward through time, so it seems obvious to us that cause leads to effect.
However… if, in fact, the effect precipitates the cause… Or some feedback combination of both… How would we actually be able to tell? Our perception only computes in one direction so we always see the cause half of it first and then the effect.
If there were people reliable enough at passing information back to their past selves to beat random chance though I expect they would already have found a way to make use of it.
Information flowing both backward and forward through time is obviously useless to us since we perceive and move in only one direction. It’s not obviously nonsense. Our perception moves forward through time, so it seems obvious to us that cause leads to effect.
However… if, in fact, the effect precipitates the cause… Or some feedback combination of both… How would we actually be able to tell? Our perception only computes in one direction so we always see the cause half of it first and then the effect.
If there were people reliable enough at passing information back to their past selves to beat random chance though I expect they would already have found a way to make use of it.