Say you were a bookie....

[Mr_J]

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Unless you believe in people being born with bad luck you will never find a "square" against whom you can bet for a sure profit.

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When we say a monkey or dart thrower will hit 50%, it's because they are betting randomly. Overall, they will have an even mix of home teams, away teams, dogs, faves etc. They are just as likely to bet on a >50% team as a <50% team.
However, squares do NOT bet randomly, just like sharps do not bet randomly. Squares are more likely to bet teams that are poor value, where as sharps are more likely to bet teams that are value. Squares have an anti-skill (lol) while sharps have skill. See what I'm getting at??