Using an Idea You Can Show, Explain, or Prove

If a main point is so obvious that it does not need support or if it states a simple fact, you will not have much to say about it.

OBVIOUS Many people like to take vacations in the summer.
REVISED The vast and incredible beauty of the Grand Canyon draws crowds of visitors each summer.
FACT Three hundred cities worldwide have bicycle-sharing programs.
REVISED Bicycle-sharing programs are popular, but funding them long-term can be challenging for cities with tight budgets.