There was a man who always acted like he knew everything. On one occasion he accompany a friend to buy a computer. Looking at an optical mouse, his friend asks "Why use light when you can use the...

There was a man who always acted like he knew everything. On one occasion he accompany a friend to buy a computer. Looking at an optical mouse, his friend asks "Why use light when you can use the ball?" The guy thought for a minute and said; "You can use it as a flashlight when the power goes out!"

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