  To make a statement about the nature and mechanism of fragmentation, it is
necessary to probe directly any competition, or lack thereof, between the
emission of various particle species as a function of excitation energy. The
task is then to find a global observable that best follows the increase in
excitation energy or dissipated energy. In the following, we will consider two
contradictory claims that have been advanced recently: 1) the claim for a
predominantly dynamical fragment production mechanism; and 2) the claim for a
dominant statistical and thermal process. We will present a new analysis in
terms of Poissonian reducibility and thermal scaling, which addresses some of
the criticisms of the binomial analysis.
