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5.6. Common Mistakes
Using two if’s one after the other instead of an if and else.
Trouble with complex conditionals which are two or more Boolean expressions joined by && or ||.
Trouble with understanding or applying negation (!). See the section on DeMorgan’s Laws.
Not understanding short circuit evaluation which is that if evaluation of the first Boolean expression is enough to determine the truth of a complex conditional the second expression will not be evaluated.
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