Goto the scene where Ian Howe is writting down on a sheet of paper what Gates said from the pipe. He circles "in Scilence" and "Mattlock". When he holds up the sheet of paper to ask his crew "Why is this letter capatlized?" and they say because its important. Thats where the slip up is. In the scene where you can see the sheet when he is asking the question, only Scilence is circled. The In wasn't.