If you put a cat in a cage with a latched door, the cat, wanting to get out, will try many areas of the cage (trial and error) until finally locating the latch and opening the door and getting out. If you put the same cat in the same cage, the cat, wanting to get out, will go straight to the latch and get out in no time.
Either you have found the latch, or the cage has no latch.
Either you have found the latch, or the cage has no latch.
