This is a coincidence, Mitch, because I am having the same quandary. I am an editor of another publication and just had a piece submitted that I suspected may be partially AI written. The AI checker I used "Scribbr" says it is 41% likely AI written. Do I query the author, let it go (as AI checkers are not always accurate) or reject it? Is there a percentage that editors should look at as a barometer?