Answer: Principles is whats being taught. So your basically focusing on what you need to do rather than people.
Explanation:
In science the word "theory" basically means a model that has been confirmed countless times and never dis-confirmed (such as the theory of gravity). We call it a theory because it's something we had to discover and it was at first not certain.
Because reflexes permit faster responses without having to bypass several synapses the higher reasoning or conscious thought is not necessary or desirable features of reflexes. The importance of reflexes is to cause something to happen. speed of prime importance, not information. You don't care how hot the stove is that in your hand is on, you just want to get that hand off the stove as fast as possible. Our reflexes enable us to survive. Adding an intervening layer of thought is to get us into trouble.
Step migration is when people migrate over small distances multiple times to eventually get to their final destination.
