Set them aside and publish an article some time, but do not cram them into your dissertation.
The very first thing you must tell your friend [or yourself] is the thesis of your dissertation.
Don't tell her the topic and then wave your hands and, as they say these days, gesture at the thesis [God, I hate that locution.] State the thesis in a declarative sentence.
Nature of the Award 1.1 The award shall consist of $1,000, given annually to a graduate student who is working on a dissertation on the philosophy of information (broadly construed).
As we see it, the range of philosophical questions relating to information is broad, and approachable through a variety of philosophical traditions (philosophy of mind, logic, philosophy of information so-called, philosophy of science, etc.). Purpose of the Award 2.1 The purpose of this award is to encourage and support scholarship in the philosophy of information. Eligibility 3.1 The scholarship recipient must meet the following qualifications: (a) Be an active doctoral student whose primary area of research is directly philosophical, whether the institutional setting is philosophy or another discipline; that is to say, the mode of dissertation research must be philosophical as opposed to empirical or literary study; (b) Have completed all course work; and (c) Have had a dissertation proposal accepted by the institution.
In preparation for writing your dissertation, you may have done a great deal of reading, and you may even have written various fragments in which you sketched out an argument.
Now, you are writing your dissertation, and since you have your reading notes and those fragments on your computer [or your telephone, or your class ring, or whatever], you figure, Waste not, Want not, I will incorporate them into the dissertation. If they are not a part of the story, they have no business being there.
In Microbiology or Anthropology or History, that can require a great deal of re-writing, or even the selection of a new thesis. Suppose you are called on to tell the story of Jack and the Beanstalk to a little group of very smart children.
In Philosophy, this problem can be handled by inserting six words into the statement of your thesis in the first sentence of the dissertation. [If you do not know this folk tale, substitute one from your own culture.
And Fourth, what is not needed, and therefore should be left out.
As the writer of a dissertation defending a thesis, you need to know the same four things.