For example, suddenly, without apparent cause, having the delusional belief that you are an alien.

This, in turn makes patients prone to delusional beliefs about themselves or others.

The delusional belief that, because one doesn't like something, no one else will.

In psychiatry, thought broadcasting is a delusional belief that others can hear or are aware of an individual's thoughts.

Psychosis may involve delusional beliefs, some of which are paranoid in nature.

"Then there are people they meet who, based on one chance encounter, develop a delusional belief that this athlete really cares for them."

There are some people who use a delusional belief in unearthly evil to do any vicious thing they want.

If disturbed behavior does occur, it is directly related to the delusional beliefs.

A person with this delusional belief is found to be convinced of their beliefs and unwilling to accept such diagnosis.

Is this yet another example of the Guardian's delusional belief that we're actually all American?