Some common reasons include: 1  a serious accident â such as a road accident, a severe head injury, a serious fall or severe burns. 2  a serious short-term condition â such as a heart attack or a stroke. 3  a serious infection â such as sepsis (blood poisoning) or severe pneumonia.
The definition of unnecessary is not needed. An example of something unnecessary is a bowl of sugar for cooking meatballs.
It has been contended that by this must be understood what is indispensable; but it is obvious the term necessary means no more than useful, needful, requisite, incidental, or conducive to. It is in this sense the word appears to have been used, when connected with the word proper. 4 Wheat. 418-420; 3 Story, Const.