Writing, the mind, and deconstructing

Plato said morality overwrites speech.  There is greater immedacy in the
mind than in writing.  When you write you can edit your own mistakes.
When speaking it is harder to do so.  I am a broadcast journalism major
and I know that fact to be true.  I am constantly editing my own stories
trying to make them the best they can be before I reach the deadline.
Once I actually perform what I have written, it can sometimes come out a
bit differently. Not always in a bad way, just in a way where it is
harder to correct myself. Sometimes it can even workout better that way. 

However Dass says both are not reliable (writing and thought that is).
He says there is more to it than that because one signifier is related
to another which relates to another, and so on and so forth.  It to
never stop or cease to exist and that there is always a way to
deconstruct something or another.

In the Derrida Documentary my classmates and I saw how deconstruction
was important to tells us what "things" are.  In the movie he was even
deconstructing the interview he was in!