Answer:
By the end of October 2012, sixty percent of the US was experiencing a drought.
Step-by-step explanation:
The sentence above presents a real and proven fact that, because of its veracity, cannot be contested and revoked.
This type of argument is very important for a debate and essay, because in addition to showing that the author has studied and prepared in relation to the topic, it prevents someone from not believing and concludes that the argument is unreal, since there are concrete ways to prove it and to show it as a truth, thus providing a strong, correct, concrete, irreducible and justified argument.