If three persons are coming over for dinner, does that stress you out?
What if it’s 17?
For those who’re giving a chat explaining your technique to 4 individuals, does it really feel like a high-risk occasion? What if it’s 54?
What number of extra persons are required earlier than it flips to annoying? As a result of the final particular person is only one particular person.
For those who’re performing in an auditorium, there are nonetheless solely thirty individuals you’ll be able to see from the stage.
N + 1 is simply 1 extra.