body: When an image has different copyright licenses, which one should I follow? 
  For example, [this image](https://commons.wikimedia.org/wiki/File:Photo_of_the_Week_-_Seal_pup_at_Back_Bay_National_Wildlife_Refuge,_VA_(5343673024).jpg) is licensed under Creative Commons Attribution 2.0 and in public domain.
  
  
  Under CC2.0, the author should be attributed while under public domain, the attribution is not required. I don't know why the same image has two conflicting licenses and is it legal to use the image as public domain?
  
  
  
title: Two copyright for the same image