steps in castles...

just a thought. On walking up the steps in the Alhambra alcazaba (fort) I noticed that the steps in the towers were at different depths. Not all, just the odd one. Now, I remember hearing that castle builders in Europe did this deliberately to put invaders off their guard (tripping as they ran up, whereas the castle soldiers would be used to them).

couldn't help thinking that this was the best line a dodgy builder had ever thrown for shoddy worksmanship.
"Oh, not the same depth you say? wellllll, that's deliberate innit? y'know, for the enemy like...."