I was never happy with this statement. Because obviously we can make very accurate predictions by applying quantum mechanics.<p>The problem with this statement is, that the meaning of &quot;understanding&quot; is unclear here. When I say &quot;I understand that, when I drop an apple it falls on the floor&quot;, What exactly do I &quot;understand&quot; here? Does &quot;understanding&quot; mean here, that our brain is trained to predict what would happen?<p>Actually there is a huge understanding on the mathematical level of quantum mechanics. To apply these equations to what we call &quot;reality&quot; is a problem. But then again, what do we mean exactly with &quot;reality&quot; here?
If some of the effects of quantum mechanics would be visible for us somehow from birth on, would we &quot;understand&quot; quantum mechanics then?