Water can boil and freeze at the same time.
That would be sublimation, well not quite. That would be the triple point.
True, its a function of temperature and pressure.
My dad told an "it was so cold" yarn about throwing a pot of boiling water out the door on a cold winter morning and it froze before it hit the ground, he went to pick it up and it scalded his hands.
@David_Cooper It is just a story with no truth to it.