
Jennifer never explained the meaning of the following line,
so I have decided to take a 'stab' at it.
pg#420: "Okay, Jenny, here it is: Must be is 'cause must
be ain't don't sound right".
I believe the meaning is: 'something' (expressed, or done)
must be true, and correct, because to not believe (at that
particular time) seems incorrect, and/or unreasonable.