  The unusual properties of the X(3872) have led to speculation that it is a
weakly bound state of mesons, chiefly $D^0\bar D^{0*}$. Tests of this
hypothesis are investigated and it is proposed that measuring the $3\pi
J/\psi$, $\gamma J/\psi$, $\gamma \psi'$, $\bar K K^*$, and $\pi\rho$ decay
modes of the $X$ will serve as a definitive diagnostic of the molecule
hypothesis.
