Why can’t you have light without dark? If you sped up all the molecules in the universe to the point that they were all radiating heat, you would have light without dark.
How would you know it’s light if there was no dark to contrast it ? Light only exist because dark surrounds it, and dark only exists because light surrounds it. One cannot exists without the other.
If I show you a black circle on a white paper you would point at the black and say “this is the thing that is drawn on the paper”. If I were to show you a white circle on a black paper, you would point at the white instead with the same statement. If I showed you an all white paper and told you there is a white circle on it, you would tell me I’m an idiot and that there is nothing there. Contrast is why something exists.
I understand you want to counter this statement with physics, and we could have a rich debate about what we know of the universe and how light and it’s absence exists in it. But I think you misunderstood what we are talking about.
This statement is about philosophy, light and dark are metaphorical here. We could just as well say “up cannot exists without down”, or “day cannot exists without night”. The next step to this philosophical thinking is to realise that since one cannot exists without the other, therefore they are the same thing.
Only if that heat radiation would be evenly distributed - otherwise you would have a gradient which still results in duality of light/dark
There are also places that are relatively empty, which would result in a more typical darkness
Also, speeding everything in existence up to the point of luminance is kind of tricky, what with natural law and all
Pretty sure almost all the matter we can interact with does produce blackbody radiation
Radiation is vibration which is subject to destructive interference which means there will always be some dark spots, relatively speaking.
Unless God just had a single source with absolutely no barriers or observers. I can see why that God would get bored and invent some drama 😆
