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<p>[QUOTE=&quot;brg5658, post: 2035607, member: 29751&quot;]Based on some of the words you use in your posts, I presume you know how to use statistics and know that a study would need to be designed in a very particular way for one to assess what you are asking.&nbsp; Such a study has been proposed by myself and by others over the years.&nbsp; Of course, no such study would ever cover all of your bases, as there are too many moving target variables.</p><p><br /></p><p>For example, say you &quot;show&quot; that PCGS is more strict that NGC <i><u><b>today</b></u></i>.&nbsp; That doesn&#039;t prove anything about the millions of coins that were graded <u><i><b>before</b></i></u> today.&nbsp; The &quot;tightness&quot; of NGC and PCGS ebbs and flows.&nbsp; And, what further complicates the issue is that there is NOT a definitive third opinion outside of NGC and PCGS that is a <b>gold standard</b>.&nbsp; Assessing the &quot;strictness&quot; of a grade without regard to a fixed reality has no meaning.&nbsp; </p><p><br /></p><p>All people can tell you are their personal anecdotes about a coin here and there.&nbsp; Every anecdote can be countered with an opposite experience anecdote.&nbsp; In the end, all that matters is that each collector knows what he/she is doing, and spends his/her money on coins that meet a certain personal standard.&nbsp; The numbers on labels inside of slabs are guides, but are not magical.&nbsp; </p><p><br /></p><p>The use of TPG grades reminds me of the old analogy of the drunken man and the lamp post.&nbsp; Do not use the lamp post (TPG grades) as a <b><i>crutch/support on which to lean</i></b>, but use it as a form of<b><i> illumination </i></b>(opinion) as it was intended.[/QUOTE]</p><p><br /></p>

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