Private Quelch’s habit of exhibiting his knowledge was quite offensive. He was reduced in rank on this account, but still he continued to show off about his knowledge. Perhaps, he was incorrigible and did not understand how to become socially acceptable. His over-ambitious nature made everyone hate him. He should not have humiliated his superior, but should have submitted to the command of the Corporal. If he had learnt to control himself from - exhibiting his intelligence, it would have saved him from further humiliation.