This glitch requires a 20 Speech skill level. Talk to the 10 of Spades in Camp McCarren. You may first need to find out about Corporal Betsy's trauma. Start a dialogue with him, and select "I heard about what happened to Corporal Betsy", then "Tell me what happened". The next options will be the Speech Check or "If you were unconscious, how could you have done anything?" Do the Speech Check, and then the other option will be the only one available except "Never mind". After you select the unconscious option, the Speech Check will be available again, but grayed out. However, you can still keep pressing [E], and they will alternate. Even though the Speech Check is grayed out, it still counts as a pass.