Suppose you are viewing a Web page that provided a running commentary of a ball game. The web page gave the "current" score and also presented the ball-by-ball commentary. We can envisage the score being maintained separately from the ball-by- ball commentary. The web page presented is thus a result of a script that combines the contents of the two results into a single integrated Web page. As you were following the game, you were surprised when the ball-by-ball commentary indicated that a "run" had been scored, but the presented score did not reflect this run. Should you have been surprised?

(a) Explain your answer by constructing the scenario that could have resulted in the above phenomenon.

(b) What could the system designers have done to avoid such problem situations? If you were designing such a system would you recommend using this solution?