Code

 Maybe since ancient times, ever since we developed language, we've wished that we could modify the world according to written information. Because, why not? As long as our document carries the necessary specifications, why can't a car simply poof into existence*? From an information perspective, what distinguishes the building of a car vs. the writing of code? Or the thinking of code, even? 

Does this get a bit metaphysical, if you think about it too hard? Does it induce that sense reality is "just" a projection of your perceptions? 
I guess a realist might disagree with this line of thinking "Of course it's hard," they might argue, "Because cars are made of metal and information is made of bits!" 

But that answer is not satisfying to me, and I do think that my line of questioning, as confused as it might be, might be illuminating. Informative, at the very least, to where misconceptions might arise regarding the boundary relation between the information world and the "physical" world, if these ought to even be distinguished to begin with. My view is that they should ought not to be, that there is some "obvious" point we're missing that swallows the whole thing. 

*Maybe because we don't have all the specifications. What is the car made of? What do we do with it? What memories have we formed with it? What is our relation to it in every sense?

I suppose if we have all of these things, then really, the only difference between that car truly "existing" vs. not existing is our willingness to "believe" it. Does a lored-out character in a fleshed-out DnD universe exist any less than the world "around" us, that we so willingly lend our "belief" to? Someone who's experienced it, I'm sure, might tell you how real it feels. It might feel horrifying to think that some universes and events in a novel might "exist" in a sense, that pretty much all consistent universes "exist", but again, why not?