You mean the whole chapter? It sounds a little goofy to me for someone to suggest that. I don’t think that even the most progressive scholars would tell you that was a possibility. This sounds like an attempt by some atheist to try to say early christianity didn’t believe in the resurrection-without any evidence whatsoever. That whole idea seems to be Paul’s main focus in his mission. It would seem stupid to suggest that ch.15 is not original.
My commentary on New Testament Greek even discusses the small amount of word variations in that chapter, but says nothing of it being phoney.
You can be rest assured, knowing that this early creed is 100% authentic.
