Check out <a href="https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=ZuvK-od647c" rel="nofollow">https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=ZuvK-od647c</a><p>It&#x27;s my favorite video for explaining how we know that the state is not determined until it has been measured. It&#x27;s not just a decision we thought up on paper. It is real and well proven.