 The category of delusions is not homogeneous. Some delusions have highly implausible content (as in the case of Cotard delusion). Other highly implausible delusions include mirrored self misidentification (the delusion that the person in the mirror is not our own reflection but a stranger), and the Capgras delusion (the delusion that our spouse or relative has been replaced by an impostor). Some other delusions can have plausible contents and can even be true. We can have the delusion that we are an uncomprehended genius, that our spouse is unfaithful, or that our neighbor is a terrorist, and these may happen to be true beliefs. What makes all the above examples instances of delusion is that they resist counterevidence and are not easily given up in the face of challenges.