This article is from the Star Trek Tech FAQ, by Joshua Bell inexorabletash@hotmail.com with numerous contributions by others.
They were testing beaming something composed of the 5th type of
simulation; an object made of Holodeck matter, just like Moriarty and
the Countess. Obviously a purely replicated chair wouldn't do for this
experiment, so Geordi probably tweaked the chair to be the right kind
of simulation to use for the test.
 
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