Seems rather to be Delusional disorder:-

Delusional disorder, previously called paranoid disorder, is a type of serious mental illness called a "psychosis" in which a person cannot tell what is real from what is imagined. The main feature of this disorder is the presence of delusions, unshakable beliefs in something untrue or not based on reality. People with delusional disorder generally experience non-bizarre delusions, which involve situations that could occur in real life, such as being followed, poisoned, deceived, conspired against, or loved from a distance. These delusions usually involve the misinterpretation of perceptions or experiences. In reality, however, the situations are either not true at all or highly exaggerated. If the delusions could not happen in reality (aliens, television broadcasting your thoughts) then a person might be considered delusional with bizarre-type delusions.

People with delusional disorder often can continue to socialize and function normally, apart from the subject of their delusion, and generally do not behave in an obviously odd or bizarre manner. This is unlike people with otherpsychotic disorders, who also might have delusions as a symptom of their disorder. In some cases, however, people with delusional disorder might become so preoccupied with their delusions that their lives are disrupted.

明白晒 Delusional disorder 的定義；這種患者有時(但不多)在某些領域能夠獨當一面，與眾不同。例如真人真事電影改編：有你終生美麗 A Beautiful Mind (Oscar winner of 4 Academy Awards)，所描述的男主角一樣，在另一方面，卻又可以獲得The Nobel Prize for Mathematics. 

我們這裡也有一位人兄，據自稱是獲得 BSc in Agriculture，不知是否在學術研習時獲得此上天厚愛？更加不知他現在是否還 Engaged in Agriculture？

請即欣賞完整免費電影版本： https://www.youtube.com/watch?v=zskVcFJ86o4