A long, very long time ago, a wise philosopher coined the following historical phrase:
No Man ever steps in the same river twice.
When you think of it, it goes a bit against the accepted physical reality, for the river does not change between trespassers. What changes is the water under the proverbial bridge, which is forever changing the user experience, so to speak.
This catchy phrase was imagined by the astonishingly prolific Greek philosopher Heraclitus, who lived in the 6th century BC, in the city of Ephesus, now Selcuk, in Izmir, Turkiye.
The man was nothing short of a genius. Nobody can deny the immanent character of change.
Everything changes including our perception.
Then how can one explicate the deja vu experiences that afflict us at regular intervals in our lives.
To me Deja Vu is a software error that can easily be ascribed to the faulty wiring in our brains.
If our perception changes in this changing world of ours, deja vu is an illusion. The river of life has changed and our perception of reality has changed with it.
Götterdämmerung 