There are many stances about the *reality* of time in science and philosophy but i believe 2 are the most important. I also mention their advocates:
** Time reality notion similar in both past and present. i.e early universe is real despite not current reality
Advogates: The overwhelming body of Scientific establishment
** Time as becoming. The past is not real. Only the present and reality is centered on becoming.
Main Advogates: Block universe theoriticians, Lee Smolin. Smolin disagrees with BU in that they endorse a "mathematical" version of time, endorses the philosophical Bergsonian* view, rendeted anti-scientific hy many, "spread at once all over space" so its unreal *not a proponent of modern science
Given that both str endorsed by modern science should we speak of duality about the reality of time ?
``acceptable'' is a social notion. I suggest to use the duality or the first alternative is to back the model of reality into a corner from which the metaphysicians have no exit such as the arrow-of-time being a postulate rather than derived from the model and the consideration of time as a dimension like distance with back and forth ability. Hence, causation seems ignored rather than being a part of physics.
The acceptance of only the NOW (the second stance) brings back causality and solves many problems in physics and some in metaphysics such as consciousness.
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