input: Text: Professor C: Starts <unk>disfmarker<unk> No. No. PhD D: No. That's a different thing. Professor C: There's another <unk>disfmarker<unk> I don't know. It starts with a P or something. I forget the word for it, but it's <unk>disfmarker<unk> it's um PhD D: Oh. Professor C: Typically when you <unk>disfmarker<unk> you're ab r starting around forty for most people, it starts to harden and then it's just harder for the lens to shift things PhD D: Oh. Professor C: and th the <unk>disfmarker<unk> the symptom is typically that you <unk>disfmarker<unk> <unk>vocalsound<unk> you have to hold stuff uh uh further away to <unk>disfmarker<unk> to see it. PhD E: Uh - huh. Yeah. Professor C: In fact, uh m my brother's a <unk>pause<unk> gerontological psychologist and he <unk>disfmarker<unk> he uh <unk>vocalsound<unk> came up with an <unk>disfmarker<unk> an uh <unk>disfmarker<unk> a uh body age test which uh gets down to sort of only three measurements that are good enough st statistical predictors of all the rest of it. And one of them is <unk>disfmarker<unk> is the distance <unk>vocalsound<unk> that you have to hold it at. PhD D: Give someone a piece of paper and then they <unk>disfmarker<unk> Oh. PhD E: Yeah. Professor C: Yeah. Grad A: We're <unk>disfmarker<unk> we're live by the way, so we've got a good intro here Professor C: Oh. Yeah. About how old I am. Grad A: Yep. Professor C: OK. Grad A: We can edit that out if you want. PhD D: Oh
  Question: What did Professor C say about the possible hypothesis?
  Answer:
output: Professor C said the basic hypothesis and starting point is if you examine the energy when two people are speaking at the same time , usually {there 'll be more energy than when one is. Coming up with a measure which will match this intuition is the next step. These energy features should be fed into a discriminative system. It is important to pick a normalization that matches the distribution for that feature.