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 hoten 07-15-2017 03:45 PM

Seemingly correct answer is not being accepted

Can someone point out the logic error I'm making here?

http://i.imgur.com/u01Bfcm.png

Quote:
 1. Neither the brown and pink seashell nor the seashell found in Martinique is the coquina shell. 2. The blue and white shell was found sometime before the seashell found in Tobago. 3. The seashell found in 2007 is either the white and yellow shell or the honey cerith shell. 4. The seashell found in Saint Lucia was found 3 years before the blue and white seashell. 5. The horned turban shell was found sometime before the brown and pink seashell. 6. Of the black and white seashell and the seashell found in Jamaica, one is the coquina and the other is the shark eye. 7. The seashell found in Martinique isn't pink and white. 8. The shell found in Grenada isn't pink and yellow. 9. The brown and yellow seashell is either the shell found in Tobago or the seashell found in 1995. 10. The pink and white seashell was found 9 years after the horned turban shell. 11. The baby's ear shell wasn't found in 2010. 12. The spotted key shell wasn't found in 2010. 13. The seashell found in 2010 is either the shell found in Martinique or the pink and yellow seashell. 14. The shark eye shell is either the shell found in Tobago or the shell found in 1992. 15. The coquina shell was found 12 years before the shark eye shell. 16. The shell found in Saint Lucia was found sometime after the white and yellow seashell. 17. The spotted key shell wasn't found in Puerto Rico. 18. The honey cerith shell was found 6 years after the shell found in Puerto Rico.

 alamakota 07-15-2017 04:02 PM

Clue #1 - brown/pink cannot be Martinique. However, that's what you show for year 2010.

 serenia 07-15-2017 04:26 PM

Neither/nor clues can be tricky.

Here is the link to the explanation in the tutorial:

http://logic-puzzles.org/how-to-solv...ther-nor-clues

 hoten 07-15-2017 04:28 PM

Of course! Thanks folks :)

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