1. A delusion is a false belief that is unshakeably held, in spite of clear and incontrovertible evidence to the contrary. It must not be an article of faith or part of a culture or sub-culture.
2. A person must be shown, clearly and obviously, that his belief is wrong. If this is not done, he cannot be said to be delusional.
3. As an example:
(i). Before Copernicus, people believed the Earth was the centre of the Solar System: they looked up at the sky and seemed to see the Sun orbiting the Earth.
(ii). Today, most people know it isn't so. If, however, there is a person who has not been exposed to the facts and who, like people before him, looks up to the sky and thinks he sees the Sun circling the Earth, that person is wrong but he is not delusional: it is not madness to be wrong.
(i). If someone approaches this man and says to him:
"I am the foremost astronomer in the world. I have been informed you think the Earth is the centre of the Solar System: you are wrong."
And then leaves. Our friend may consider this statement but, in default of further information, should he be unable to arrive at that conclusion, he has the right to hold to his opinion and not to be declared insane for doing so. He must first be presented clear and obvious proof the conclusion he has reached is wrong, before he may be declared delusional.
4. In my case, I have not been offered proof the conclusions I reached are wrong.