Does anyone understand the 'review' laws in the World Cup Cricket? If you do can you explain this please.. details to follow...?

Update: England bowl, it looks like LBW but the umpire says 'not-out'. England appeal and the referee looks for a no-ball....fine, then checks for a nick...fine...then when they check to see if the ball was going to hit the stumps the find it WAS..yet the 'not-out' is upheld. What is the point of a review then? show more England bowl, it looks like LBW but the umpire says 'not-out'. England appeal and the referee looks for a no-ball....fine, then checks for a nick...fine...then when they check to see if the ball was going to hit the stumps the find it WAS..yet the 'not-out' is upheld. What is the point of a review then?
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