Passage Summary: Just because Irish druid stones are old doesn't mean a Scottish one can't be just as old; the argument assumes location dictates age.

Conclusion: This specific druid stone must be relatively new compared to the ones in Ireland.

Reasoning: The stones found in Ireland are ancient, but this particular stone was found in a different location (Scotland).

Analysis: This is a classic case of assuming that because a property applies to one group, it cannot apply to a different group. The author fails to consider that stones in Scotland could be just as old as, or even older than, those in Ireland. It is a bit like saying 'The pizza at Joe’s is hot; this pizza is from Pete’s, so it must be cold.' Look for an answer that points out the total lack of evidence regarding the age of Scottish stones specifically.