But we can&#x27;t predict when a toddler will collapse, or when she will start throwing toys, using the current understanding in physics, even if &quot;The Laws Underlying the Physics of Everyday Life Are Completely Understood&quot;.<p>What I am getting at is that we only understand the Low Level laws. We still can&#x27;t understand, for example, financial markets or the weather. Complex dynamic systems are still beyond our horizon of understanding, even if we know how elementary particles behave.<p>Another example, and this one is very basic: Predict the state of a system of 3+ bodies moving in space. <a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Three-body_problem" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Three-body_problem</a>