 The attempt to influence B’s behavior takes on a manipulative character when … A’s primary intent is no longer to convince B, in a good faith manner, that acting as desired by A would be in keeping with B’s rational assessments of outcome; [but rather] to procure or engineer the needed assent by bringing pressure to bear, in a deliberate and calculated way, on what he presume to be the manipulable features of B’s motivational system. (Kligman &amp; Culver 1992: 186–187)