It doesn't mean that their views are not error-free,but it is just that they speak from the perspective of people who have devoted years to the game.
So with the 2014 FIFA World Cup just three days away,predictions have been coming and people have been giving their opinions on those they think might win it.
The World Cup starts in Sao Paulo on Thursday and finishes in Rio de Janeiro on 13 July.
Thirty-two teams will contest the tournament, including hosts Brazil, holders Spain and perennial hopefuls England.
But who will get their hands on the famous trophy, how will the Three Lions do this time, and which outsiders could spring a shock?
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Source : BBC Sport