A recent post in The Lede examined a suspect case of “locked-in syndrome” (also featured on an episode of House starring Mos Def), including the efforts of Randi and others to expose issues with facilitated communication as a means of determining this condition. Of course, it’s next-to-impossible to get someone to adopt the axioms that would lead them to question this methodology. The best one can do is show that someone with a certain set of axioms will have similar doubts.
Likewise, if one holds the axiom that Geller is a psychic or psychic phenomena exist, it would be difficult to convince one otherwise. However, if one does not hold such an axiom, the following video raises doubt that Geller adopts any paranormal means to conjure the following event when Randi can replicate the same behavior: