I don't see it as uncalled for, and I didn't slight anyone with what I said.
My mother knows very little about coins, but when I showed her a real doubled die and
Machine Doubling together, she was 100% at picking the difference time and time again. She now knows how to tell the difference without a problem, and she spends zero time looking through coins. She only sees the ones I give her to look at.
So, with this to wit, my statement stands. If people here who have trouble seeing the obvious difference between
Machine Doubling and doubled dies would simply pony up the $10 for an example of one of the more dramatic and common doubled dies (such as the 1995
DDO or either of 1972P die #3 or die #8) they would instantly be able to tell the differences, which are dramatic and obvious.
I see this as a natural part of the education process for anyone interested in die varieties. I started this when I was 10, and didn't have the money or resources to own a real doubled die until I was 15. During that five years I was in a haze of lacking understanding why doubling was so easy to find yet it was so valuable, then I got my first doubled die Lincoln - and instantly realized much of what I had been saving was junk. It was that fast - the lights went on and I started on the right path of hunting for varieties rather than saving junk.
All I do here is suggest the same thing, and used the story about my mother as my reasoning. Showing her two coins, one doubled die and one machine doubled coin, she was able to tell which was which without any explanation. She has since been successful at telling the difference without help.
Perhaps a number of the people here who still don't know the difference should heed the advice instead of choosing to stay in the haze not knowing what they are looking for.
Someone else chime in who recently had the light go on and tell how good it feels...you actually know something about what you've chosen as a hobby, and it feels good to have that knowledge.