DYLAN [In a cafe, out of the blue]:    Are there numbers less than zero?
DADDY:  Yes.  Negative one, negative two, negative three point one four.
DYLAN:  Is 'negative six' a number?
DADDY:  Yes.
DYLAN:  Are there any numbers that you can write but not say?
DADDY:  Yes.
DYLAN:  What are they?
DADDY:  I'd have to write them down in order to answer you.  Mostly ones with lots of zeros after them.
DYLAN:  Are there any numbers that you cannot write and cannot say?
DADDY:  That's a good question.