

It’s both! Marketing blabber and general public usage have obliterated any meaning, let alone its original one.
But in the philosophy of science, Thomas Kuhn was onto something…
https://en.wikipedia.org/wiki/The_Structure_of_Scientific_Revolutions
He noted that scientific progress tends to be incremental, building and evolving what came before it. But there comes a time where what we thought we knew becomes incompatible with what we are now learning, forcing a paragigm shift.
E.g. Relativity replacing newtonian physics, or copernican heliocentrism replacing ptolemaic cosmology.
Edit: Very real. Impossible to predict. You only know after you had it.











Erotic is what I like, vulgar is what everyone else likes.