Such events seemed unthinkable to most mainstream commentators a few years ago.
Thankfully Ferguson was one of them too, and the unthinkable defeat became merely an unpalatable draw.
Before the event got under way, that prospect seemed pretty much unthinkable .
In extreme cases it can also lead to suicide and, unthinkable but not unheard of, the death of a child at the hands of its own mother.
A whole winter brooding on the events of August would be unthinkable for such a meticulous mind.
What are the frontlines of defence against such an unthinkable catastrophe?
Less than a decade ago such adjoining public events would have been unthinkable .
By 60, you've learnt to think the unthinkable and, even better, to say the unsayable.
Such draconian measures would be almost unthinkable in a democratic system.
Yet think of other Scots for whom such a remedy would be unthinkable .