Thought experiment: say to the songwriters accusing Ed Sheeran: we are going to use software to evaluate all the songs you wrote against all other songs in exis

Thought experiment: say to the songwriters accusing Ed Sheeran: we are going to use software to evaluate all the songs you wrote against all other songs in existence. If we find at least one overlap, of any of your songs with any other song in existence that was released before, of the same or longer length as claimed plagiarism, you are getting sued. I wonder if this would change their attitude to the problem.