In addition to the six relational operators that are available as operators in a logical rule, there are four special operators that can be used in logical rules. They are the "contains" and "does not contain" operators and the "is answered" and "is not answered" operators.
"Contains" and "does not contain"
The "contains" and "does not contain" operators are only available for use in logical rules using a checkbox field. To find about more about the "contains" and "does not contain" operators, and the other operators for checkbox fields, click here.
"Is answered" and "is not answered"
The "is answered" and "is not answered" operators can be used in logical rules containing any type of field (excluding rich text fields). As the names suggest, a logical rule containing "is answered" will validate true when a field as been answered. Similarly, a logical rule containing "is not answered" will validate true when a field is not answered. When using either "is answered" or "is not answered", you do not need to include an answer for the logical rule (see below).
Other operators
To find out about the equality and relational operators eg, "equals" and "greater than", click here.