There is only one truth.
I've seen that move several times already.
There's this way a person speaks where they remember all the details of something that happened that has got to do with them or someone they know. It's not like when I explain to people everything that's on my mind or remind them of something they forgot which is almost exactly similar to what he did. There's a very subtle difference and only people that have heard enough bullshit could tell it apart from the real thing.
If you try to call them out, they have the perfect response to everything and they have already prepared their answers beforehand. Their body language for example is that they never break eye contact and they're speaking in a much faster tempo than how they usually do it.