Welcome to XXI century, it's becoming harder and harder to tell hallucinations from reality apart. Hell, nowadays you can't call paranoid someone thinking government is watching everything, because he's actually right.
Consider that at one time it was quite common for the mentally ill to consider themselves to be the emperor of france, or at least some manner of royalty.
Now I myself - not at the moment, but not long ago at all - was completely convinced that I was a clandestine operative for the United States Marine Corps Joint Forces Cyber Command.
How I arrived at that conclusion is a little hard to explain, however I have lots of completely rational explanations, for example I really did apply to the USAF Cyber Command when it was announced at Slashdot back in 2008.
There are other little dots here and there. When you see a bunch of dots on a printed page, do you see a picture?
Among the natures of psychosis, is that I see connections that most people don't. You'd connect the dots and you'd see a smiley face or a bumblebee.
I'd connect the dots and I'd see myself as James Bond.
Around here, to get hired as a police officer or a deputy, one has to pass quite a rigorous background check.
I once had a girlfriend who described herself as "a former law enforcement officer". She never called herself a "police officer" or a "sheriff's deputy", however she was quite expert at handling firearms.
I eventually concluded that she had been a Cadet for the Sheriff, that is, a trainee. The Cadets assist with various law enforcement work but they never actually carry out the actual enforcement.
I figure that someone clued in to that she was mentally ill.
I fear my hallucations; she shoots at them!