If you say “John loves Mary and vice versa,” “vice versa” is an autoclitic mand if the form of the response is controlled by the fact that the listener reacting as though the reverse were also true would currently be reinforcing to the speaker, even if it is not at all true.
A verbal relationship with the following features:
The controlling variable is an establishing operation
It enjoins the listener to alter his or her reaction to the primary response
Response topography
The listener’s current reaction
The specific type of reinforcement specified by the response