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# S4 method for syntaxrelation,logical |(e1, e2)# S4 method for logical,syntaxrelation |(e1, e2)# S4 method for syntaxrelation,logical &(e1, e2)# S4 method for logical,syntaxrelation &(e1, e2)
# S4 method for logical,syntaxrelation |(e1, e2)
# S4 method for syntaxrelation,logical &(e1, e2)
# S4 method for logical,syntaxrelation &(e1, e2)