Final answer:
In Splunk, a boolean variable can have two possible values: true or false.
Step-by-step explanation:
In Splunk, a boolean variable can have two possible values: true or false. These values represent the two states that a boolean variable can be in. The value true represents a true condition or a positive result, while the value false represents a false condition or a negative result. For example, if we have a boolean variable named 'isLogged', it can be assigned the value true if a user is logged in to a system, and false if a user is not logged in.