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<p>[QUOTE=&quot;messydesk, post: 3911595, member: 1765&quot;]Shifting grading practices over time may be a reality, and being aware of it is necessary when buying coins, but it&#039;s a non-issue when it comes to training a neural network to grade coins now according to some defined standard, good or bad.&nbsp; Attempting to train a neural network to learn how to change its standards over time to react to the market is an entirely different problem.[/QUOTE]</p><p><br /></p>

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