Position dancing
About
Position dancing refers to a debate technique where a debater never explicitly takes a specific position and is therefore not required to defend it. The freedom to change position as needed also frees the attacker from the need to maintain internal consistency. This essentially tilts the playing field heavily in favor of the attacker.
Position dancing is a rhetorical deception; it can be seen as a form of topic shifting, where the subject under debate is never clearly stated. It often includes a covert straw man attack, where the attacker subtly shifts the (implied) topic in ways which leave the defender apparently defending views whose defense is not necessary in order to defend the original point (and which may even be views the defender does not hold).
This technique is most commonly used in support of a conservative viewpoint, as it tends to favor the status quo by allowing easy demolition of new ideas without exposing pre-existing beliefs to equal scrutiny.