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highlighted flaws in his experiments, such as lack of controls to prevent trickery. Agenor de Gasparin conducted early experiments into table-tipping. For five months in 1853, he declared the experiments a success, being the result of an "ectenic force". Critics noted that the conditions were insufficient to prevent trickery. For example, the sitters may have moved the table with their knees, and no experimenter was simultaneously

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