The following form a Request for Service makes use of conditional Logic, it then allows you to show or hide fields, sections, pages or even the submit button based on user selections.
This allows you to easily control what information your user is asked to provide to your website and tailor the form specifically to their needs. Basically it uses the principle (if one is true, the other has to be false).
[gravityform id=”6″ title=”true” description=”true”]