That happened to me this week during a discussion that was phrased: What do you all think would have happened in the storyline if Frodo did not stop Faramir from killing Sméagol and actually allowed it to happen?
The discussion was centered around what happens after this event. Except for me. Without a moments hesitation, I went for:
Faramir would never have killed Smeagol outright. But if Frodo had called his bluff, it would have broken the chain of Mercy that let the ring be destroyed.