It is so common that it was given the name "Halloween problem" in 1974 (https://en.wikipedia.org/wiki/Halloween_Problem). Not because it is particularly scary (though it may be so) but because it was identified on Halloween day!
It is so common that it was given the name "Halloween problem" in 1974 (https://en.wikipedia.org/wiki/Halloween_Problem). Not because it is particularly scary (though it may be so) but because it was identified on Halloween day!