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| class TrueClass | 
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true is the only instance of class
  TrueClass and represents a logically true value in boolean
  expressions. The class provides operators allowing true
  to be used in logical expressions.
  | instance methods | |
| & | true& anObject
        -> anObject | And---Returns falseif anObject isnilorfalse,trueotherwise. | 
| ^ | true^ anObject
        -> !anObject | Exclusive Or---Returns trueif
      anObject isnilorfalse,falseotherwise. | 
| | | true| anObject
        ->true | Or---Returns true. As anObject is an
      argument to a method call, it is always evaluated; there is no
      short-circuit evaluation in this case.
 
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