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In the first under-glass demonstration, the pointer may be responding to changes in air pressure due to temperature fluctuations. It seems to move while his hand is creating a shadow on the left side of the bowl. I don't know how much air current that could create, but the pointer is obviously designed to move with very little resistance.
In the second under-glass demonstration, it's hard to tell what's really going on. So little of the scene is shown that any of a myriad of tricks are possible, such as magnets under the table or heat being applied from a certain direction.
In the third demonstration, the one in the bottle, the top of the bottle is never shown. The bottle itself is obscuring enough that, in addition to outside forces mentioned above, even a small wire or string could be used to manipulate the pointer.
The next video seems to try to address the above concerns, but it still leaves many questions unanswered. First, how do we know that there is not some sort of magnetic force being applied off camera? Second, because there is no sound, it's hard to say whether the hot air blower is actually blowing on the glass when the claimant points it there. Finally, if PK is supposed to emanate from the mind, why does the pointer seem to be reacting to his fingers?
Regarding the fan demonstration, it appears that the object fan is simply not a very effective wing, or that the airflow over it is turbulent. Unlike the pointer, this apparatus does not appear to respond directly to the claimant's hands. Rather, it seems to slow down and speed up of its own accord in a chaotic manner. The fan is reminiscent of people who claim they have the magical ability to turn off streetlights because streetlights seem to turn off as they walk by. In reality, some streetlights overheat, turn off, and then cool and turn back on. They do this whether you're walking by or not, it's just that you only notice it happening when you walk by. Likewise, I suspect the fan would respond chaotically whether the claimant's hands were waving around or not. Again, the motion of the hands does not seem to have any bearing on the fan's rotation.
Bring the guy to MIT. Then I'll believe. Money and influence aside, imagine how much it could benefit humanity if we could understand and harness this allegedly untapped energy source! To withhold these abilities, if they exist, from scientific scrutiny is unconscienable.
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"If I cannot smoke cigars in heaven, I shall not go!"
- Mark Twain
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