For example: On days when you have overslept and need to leave 10 minutes earlier, your preschooler will "accidentally" dump an entire box of cereal out on the kitchen floor.
Paradoxically, waking up earlier by no means ensures a leisurely morning...
Second Law: The amount of mischief a preschooler is capable of automatically increases so as to ensure that it exceeds the amount of time you have available to get ready and leave the house.
For instance, on a (rare) morning when you wake before your alarm, feeling rejuvenated and refreshed, your preschooler will not only dump the cereal on the floor but will also add an entire carton of milk. While you are cleaning this up, they will "help" by sweeping the mess under the fridge.