Minecraft wiki entry for Legacy_village_mechanics, associated text: In the next example, the door passes the test on the initial first check. It has one covered space on the left side and two on the right. This makes it a house with the "inside" to the right. The second check would pass as well (with the "inside" on the left this time), but since the first one already passed, we don't even bother testing again. This door counts as a house, with the "inside" on the right: