One of the most amazing scenes in Avengers Infinity War was when Doctor Strange looks into the future and see 14M possibilities of Avengers losing to Thanos but they win in only one possibility. Was Doctor Strange lying to Tony Stark? Here’s a fan theory that proves that.
So, in Doctor Strange when the Ancient One falls off a building and her surgery is going on, Doctor Strange and Ancient One have a conversation when she said, “I spent so many years peering through time, looking at this exact moment, but I can’t see past it” which means that if Doctor Strange dies then how can he look past his death. But, if you remember the movie then she also said that she tried to look in his future but could not see it, only its possibilities. So, there is a chance that Doctor Strange did not look into his own future but looked into Tony’s future. Also in Avengers Endgame, she told Hulk that Strange is meant to be the best of us. So there is a possibility that Strange knows how to use the Stone in ways that she never could.
So, when Iron Man asks him whether this was the timeline where they would win, he says that if he told him what happened in the future then it won’t happen. This is because Doctor Strange is well aware of Stark’s ego and if he told him that he would die protecting everyone, there would have been a chance that he would not have snapped his fingers. Write down in the comments below if you think that this theory makes sense.