This is not my area of expertise but as far as I understand we refer to a conditioned sound change if a phoneme when in a certain environment becomes another phoneme - there is a certain condition that propells the change. On the other hand we refer to an unconditioned sound change if all phonemes of, for example, two different kinds are merged into one phoneme - there is no condition as it happens in all instances, and ultimately there is a reduction in the number of phonemes as one is substituted for another.
<u>Explanation</u>:
I Assumed you are referring to the story, "FAHRENHEIT 451
" by Ray Bradbury
Interestingly, we see the conversation that transpired on page 61 of the text. There Montag was indirectly referring to the many "educated" individuals who due to their not having a home, sought refuge along the train tracks.
So in other words, he was alluding to the fact tha<u>t even though lots of persons had University degrees, they were unfortunate and lived along the rail tracks in the city.</u>
It Uses It Correctly. However You Could Also Use A Comma In It's Place.
The strategy that will help you revise your choice of words to achieve your purpose is to think of what message you want to give such as in an introduction to a topic whereby you want to cover the main points to be expounded on in the main paper or essay or chapter of a book you may be writing to set the stage for their full explanation.