In the sentence "They say we will not be able to afford to own houses in a few years." there's a <u>pronoun reference</u> error. It is unclear who the pronouns<em> they </em>or <em>we </em>are referring to.
Pronouns are used to replace nouns, and it is considered to be a pronoun reference error when the reader is unable to deduce from the text the noun being replaced by the pronoun.
"Why decieve myself? Isnt it obvious to everyone but me that im dying, and that its only a question of weeks, days... it may happen this moment." We can tell this because hes saying that he can die anytime soon.