As a general rule of leadership, those in a crisis who immediately start to blame others should be sacked immediately.
The correct stance is to accept responsibility and then determine whether or not you should resign.
The resignation decision is not so much to do with the mistake that has been made but whether or not you maintain the confidence of the key stakeholders.
In Mr Williamson’s case that’s not just the educational establishment (teachers, universities etc) but also students and their parents.
This is especially important in the current situation where getting everyone back to school requires a great deal of confidence.
The irony is that by not taking responsibility the situation worsens causing further personal and institutional damage - the latter we can ill-afford.
Mr Williamson should resign because he has lost the confidence of those whose support he needs to do his job.
If he can’t figure that out by himself, he should be sacked. If not, the government will continue to bleed confidence in the worst of all possible times. /ends