By 2020, a Sinn Féiner, too young to have participated in the Troubles, might have been the First Minister of Northern Ireland for three years without the sky's having fallen in.
Not that anyone in Great Britain ever really notices Northern Ireland, anyway. Well, apart from the diehard Irish Republicans, of course.
Nor do they take sides in the Middle East. Well, apart from the Muslims, of course. Plus a section of the Jews, but it is not clear how large a section, and in any case there are vastly fewer of those.
This, though, is all that Corbyn's enemies have.
By common consent, people agree with his policies.
We are expected to believe merely that they would prefer them to be delivered by someone younger and better-dressed.
But Theresa May is already 60, and she is prone to serious wardrobe malfunctions several times per week.
The 2020 Election is going to be about policy. And she doesn't really have any. But he has lots.