What does the error message "use of the bitwise operator '|' with boolean values" mean?

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The error message "use of the bitwise operator '|' with boolean values" means that the bitwise OR operator (represented by '|') was used to compare or manipulate boolean values (i.e., variables with the data type of boolean or expressions that evaluate to either true or false). The bitwise OR operator is typically used to perform bitwise operations, such as combining or masking binary values, and is not intended to be used with boolean values. This can result in unexpected and erroneous outcomes.