"That's why Blair is useful.
That's why it is useful for agricultural studies of crop yield but largely irrelevant to the human situation.
The BlackBerry has succeeded, says Mr Owen, because it is easy to explain what it does, and why it is useful.
The following example shows why it is useful to work in conformable differential systems.
This article analyzes how and why collaboration is useful in web design.
That is why it is useful to look at 14A reports, because they uncloak the people responsible for the execution the compensation committee of the board.
This is the reason why it is useful to develop techniques, by which stability problem can be separated from the approximation problem.
Gunshots are difficult to detect by ear, which is why ShotSpotter is useful in determining the presence of danger.
At the same time it helps reduce inflammation, which is why it is useful alongside blue-light in treating acne".
Rather than explain why chess is useful, we might be better served to just show our track record of success.
