What can settle the discussion for you...

Teachers change.
Ministers leave.
Principals of schools transfer.
Students graduate.

With some people and situations, every fight is not worth engaging, every hill is not worth dying upon and every argument is not worth having.

Why?

Because convincing someone of your point of view isn't always required.
With some people, when it comes to peripheral issues, you don't need to persuade someone.
Some issues don't need to be immediately resolved.

In some cases, the resolution of a problem will be found with time.

In place of structured arguments, perseverance will open up avenues.

You just need to outlast and out-survive.