It's perfectly logical if you can get your head around what HP and damage actually are (or more importantly, what they are not) in 4e terms.
They're numbers. Thats the only perfectly logical answer 4E will give us. You "hit" people with things and deal "damage" to them to the point that they are "bloodied", but they can take a brief rest and get "healing surges" and are no longer damaged. There is nothing even vaguely logical about it. It's a number that can be altered in various ways and when it is at certain values you have to apply certain rules. There is absolutely no modeling of any sort of logic or reality being done with that number. Fall off a cliff, rest for 5 minutes, you're fine. Jump in some lava, get out, rest for 5 minutes, you're fine. Get hit in a critical spot with a sword, rest for 5 minutes, you're fine. Fumble and have a dagger land on your foot and lose 1 hp, drink a magical healing potion and nothing happens because you've spent too much time resting already today.
