On the surface, this sounds to me like a "Space, because space" project. What are the specific benefits to having our servers in orbit as opposed to on Earth?

Why not build data centers around Earth so that there is always solar power available to some of them (and you perhaps get to use the waste heat for something useful like heating homes), and then make the data centers available everywhere on Earth via satellites or something?

My non-conclusive arguments for this are as follows:

• Each rotation equals one hour.
• We cannot privilige the human experience, and therefore the length of the earth day cannot be a physical constant.

This is a really interesting point.

We know for a fact that Hermione has been manipulated because we've seen the scene with Hat and Cloak. That may bias us in favor of thinking the evidence is clearer than it really is. Yet Harry knows that in this universe memories can be tampered with. The prior probability of a morally upstanding little girl trying to murder someone is much less than the prior probability of someone else trying the memory-charm plot, especially given that Hermione is friends with Harry and Harry's status as the Boy Who Lived makes him a target.

Now, I might put a probability of something like 0.2 on the possibility of Hermione casting the charm after someone messed with her mind. But if you're the plotter, it's so much easier to do a false memory charm to make her remember casting the charm, than to do all the delicate manipulation to get her to actually cast it. So more likely than not, Hermione didn't cast the charm.

Harry is making a subtle mistake here, though: he's over-confident about his ideas about the details of what was done to Hermione. For example, he thinks a false-memory charm was used to cause Hermione to start obsessing over Draco, when in fact that was based on true memories of a conversation (albeit one involving lies and some kind of shape-shifting/illusion magic). Feminist bank tellers and all that.