From
Adventurer's Guide to Eberron, page 12:
The lightning rail gets its name from the electric bolts that jump between conductor stones (and to a coach when it passes over them).
It's contradicted later on. But this is the Eberron Inconsistencies topic.

Woot!
Since nobody has mentioned it yet, one of the big inconsistencies with Eberron is the scale of the map. There was a lot of discussion about this when it was first introduced; the scale per the book is mind-bogglingly vast.)
How is being big inconsistent? The game is about big giant vistas, vast possibilities, a big wide world out there of mystery and adventure.
On the detect evil issue...
Paladin - "he is evil! Arrest him!"
Officials - "what is you evidence?"
Paladin - "my innate ability to sense evil has been triggered!"
Officials - "right..."
In a world where paladins are real, their abilities would be accepted as real without question.
The third line would be, "I am paladin of X and my testimony is sufficient."
The fourth line would be, "Right away, your holiness!"
Except maybe for the ignorant or the inexperienced "officials" of the milieu; they might not understand. If they gave the paladin trouble, they would probably get into trouble later on when their superiors who did understand found out, unless those superiors were the sort who wanted to stand against law and good, basically villains, of which there are plenty.
A trial would come up (or some type of review), and if no crimes were found, the paladin would then get in trouble for abusing his/her public trust. It would get reported to the paladin's religious superiors and might require atonement (at least to me).
If the paladin lied about what happened to convict the arrested man, in my opinion that would cause either an immediate and blatantly obvious warning (to the paladin) from the god in question, followed by a required quest and atonement, or an immediate loss of all powers, followed by a required quest and atonement while bereft.
One third of Eberron humans are evil. Paladins can't go on mass arrest/killing sprees.
The town bully is probably evil. Killing him is still vigilantism.
I think the basic idea was:
This one bugs the hell out of me, and is a huge inconsistency. How does a church with hundreds of paladins have evil priests that go unsmited?
It is not about whether evil bullies could continue to exist.
It is about whether evil priests of the same religion, possibly living in the same temple, could continue to exist.
Having a radically different alignment indicates carrying a radically different philosophy, which is heresy, which has basically been punishable by either death or excommunication for a long time. Paladins should be able to point this out to church superiors immediately, as well as serving to assure that the church superiors remained untainted.
In a world with illusions or other forms of magical concealment, there would undoubtedly be annual (or even more frequent) religious rituals designed to cleanse off all all such disguises, with participation being mandatory, leaving only the truth behind in order to keep the religion pure. At least a lesser artifact would be required to get by it, so any real "mole" would be a major character in the milieu. Like any good pulp novel, that person would be the bad apple corrupting everyone else too slowly to change their alignments all the way to evil (presumably), but still disrupting a religion by setting its adherents against one another over technicalities (which, historically speaking, are often the most contentious issues for religions).