Also, looking for proof in a complex system will often lead you down the path of least resistance (the path for which it's easiest to find supporting proof; not

Also, looking for proof in a complex system will often lead you down the path of least resistance (the path for which it's easiest to find supporting proof; not necessarily the best path). So asking for proof is just evidence of a lack of systems thinking at play. Ability to understand your specific system and guide it is the far more important factor.