OTOH, Laplace's equations still remain, why not his "demon"? (I know he got it defied by science, but look it as a concept)
We're way better science-wise right now, but certain sacrosanct truths still remain (until proven wrong). Just my 20c.
It's just an extremely one-sided view of reality, one strain of many in philosophical discourse. If you think about it, any
objective interpretation of the world can only be merely subjective as well. Ok, then you might say this is my
subjective view of things. Indeed, if this line of deductive reasoning would be expressed in a language of formal logic, we would get an infinite regress. That's why there is no answer yet.
To get more concrete, the opposite view of something like Laplace's demon goes back to
Plato's cave. Modern variations would be the
Brain in a vat, the Matrix metaphor, the
Simulation argument, etc... Solipsism was already mentioned in this thread.
But also in a more materialistic world view, when aligned with insights of more modern physics, you'll reach the conclusion that Laplace's demon is merely an obsolete representation of the age of Newton. When applying Einstein's theory of relativity, it doesn't seem to be a sufficient model anymore. As a thought experiment, try to imagine the universe from the perspective of a light ray. Further, without delving too much into false
quantum mysticism, phenomenons like the observer effect or quantum entanglement remind me of a nature of reality that indeed seems to rather resemble a virtual world, i.e. particles don't really exist, but rather are rendered on-demand like in a 3D game. I'm not saying this is what the nature reality is, I'm just saying that for now this seems to be a better model.