The argument, which states that WPTK’s broadcast of traffic updates would reduce the incidence of auto accidents on Metropolis-area roads, has merit. However, the argument also exhibits several serious flaws which could limit its persuasiveness. The author weakens his claim by assuming that televised traffic updates would be timely enough to impact drivers’ actions, by failing to explicitly state how the updates would affect auto accidents, and by predicting a “significant” reduction in Metropolis auto accidents without specifying what kind of a reduction would be deemed “significant.”
The final paragraph is the place to cover what else you would need to know before you are able to decide whether the conclusion is actually valid. This �what else� paragraph obviates the necessity for a formal conclusion. Useful statements are along the lines of:
In order to decide whether, indeed, ABC is actually the case, it would be useful to have access to XYZ.
XYZ might include one or other of: Expert opinion (. business consultant) / statistics / surveys / research data etc depending on the focus of the essay.
It is useful to end the essay on a note of doubt. Suggest that the argument might have a valid point, but that more information would be needed to come to a specific conclusion.