Credibility of the Evidence for Reason Three

Our second step is to ask ourselves, "Is this evidence credible?" In other words, can we trust the evidence the writer offers us? In this case, some of the evidence presented comes from "official" sources (like the Coloradoan article discussed in paragraph 11), while some comes from the writer's own knowledge/expertise (like the suggestions given in paragraph 13). In this latter case, the writer sounds like she "knows her stuff"; in other words, she seems to speak with authority about alternative grasses. On the basis of this, her evidence as a whole seems to be credible. However, if we wanted to question her argument in this area, we could challenge the credibility of some of the evidence she offers from her own knowledge, rather than from sources.