The choice between locality and realism can be easily summed up as thus:<p><pre><code>  Either you believe the state exists but is unknown, and 
  cannot be known until measured,

  or, you believe that you know the state does not exist,
  and materializes upon measurement.
</code></pre>
But what these two concepts drive at, is whether or not a single meaningful, distinctive, isolated history determined the current state of the universe, and whether or not there is only one deterministic way to arrive at the present moment.<p>If you&#x27;re satisfied that their might be multiple past states which could all produce the same result, determining the current state, then you can safely ignore these semantic debates, about whether there is a concrete-but-unknown value, or whether the present value remains uninitialized and undefined.