Once we move our search to the region of the mind, we find that access to the facts becomes much more difficult; as a result, disconfirmation is largely out of reach and metaphor begins to flourish.
One can reduce the disconfirmations of economic generalizations by specifying a margin of error.
The empirical data obtained in a test—or, as we shall prefer to say, the observation sentences describing those data—may then either confirm or disconfirm the given hypothesis, or they may be neutral with respect to it.