Determining the Effectiveness of Reason Three

After determining that Reason Three is indeed relevant to the argument's claim, we may go on to determine whether or not it is effective (or "good"). In other words, does the reason invoke a value that most people (most importantly, you as a reader) can believe in and accept?

In this case, the reason, which challenges the necessity of traditional landscaping methods and grasses when alternative ones (more appropriate to the West) are readily available, invokes the value the reader places on convenience and common sense. This may or may not seem like an effective reason to you, and if it doesn't, then this is something to remember when you complete your analysis of this argument. However, we might predict that most readers would probably be motivated by a desire to do something that "makes sense" if it is convenient to do so. Therefore, we might judge this to be an effective reason.