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<p>[QUOTE=&quot;Publius2, post: 8040926, member: 105571&quot;]This is good as far as it goes but I think it leaves out one or maybe two critical dimensions and those are depth and width.&nbsp; Hairlines meet the above definition but I don&#039;t think anyone in the numismatic community considers hairlines to be &quot;scratches&quot;.&nbsp; So, somewhere the issue of depth and maybe width needs to be in play here.&nbsp; After all, the difference between a hairline and a scratch is only a matter of degree.</p><p><br /></p><p>Off hand, I can&#039;t think of a geometric definition of depth and width that, along with the above definition, would narrow it adequately without introducing more confusion.&nbsp; This may be a bit like one Supreme Court justice&#039;s definition of obscenity/pornography:&nbsp; &quot;I can&#039;t say what it is but I know it when I see it.&quot;[/QUOTE]</p><p><br /></p>

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