A famous resolution of the twin paradox on YouTube has been done by Doctor Lincoln and even though it might seem legit, it is in fact wrong.
Doctor Lincoln claims he solved the paradox without acceleration by introducing not two but three observers but the Lorentz transformations were incorrectly used and the problem presented in his video is in fact just hidden clock synchronization problem.

link to the Lincoln's video:
   • Twin paradox: the real explanation  

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