  I present a general scheme through which the evidence of a superposition
involving distinct classical-like states of a macroscopic system can be probed.
The scheme relies on a qubit being coupled to a macroscopic harmonic oscillator
in such a way that it can be used to both prepare and probe a macroscopic
superposition. Two potentially realizable implementations, one with a flux
qubit coupled to a LC circuit, and the other with an ion-trap qubit coupled to
the collective motion of several ions, are proposed.
