I would say they overestimate their ability to tolerate alcohol
Answer:
According to the population census of 2011 (2068 BS), there are 123 identified caste/ethnic groups, language groups and more than a dozen of religious groups.
These kinds of delusion is known as being:
paranoid
When a person is being paranoid, he or she can not stop thinking of negative happenings or thoughts that may happen to him or her. These type of persons are suffering from the mental condition commonly known as paranoia
Thus, the answer is:
paranoid
Overloaded to work with a specific class
Answer:
Louis for the American interior. The expedition traveled up the Missouri River in a 55-foot long keelboat and two smaller boats. In November, Toussaint Charbonneau, a French-Canadian fur trader accompanied by his young Native American wife Sacagawea, joined the expedition as an interpreter.