Who's truth? There is no absolute truth, only views of truth that varies, hence everyone has their own truth. We can claim that steel is solid material, but that is not the truth, heat it up enough and it is not solid at all, so what truth is such that is not true? What if we define that steel is solid in 50F and 1 atmosphere of pressure, is that a truth? But you still can't know if you are alive or if you are just part of someone imagination and thus non existing at all, there is no truth, just perception of truth which is different for everyone or everything.
This is the problem, I don't listen rap, I know there is 50 cent, Snoop Dogg and Ice Cube, can't tell anything about their lyrics though, but Ice Cube has left best impression on me, if I remember even that right. So I guess I'll have to pass this one.