Contestable vs Refutable - What's the difference?

As adjectives the difference between contestable and refutable

is that contestable is that which can be contested while refutable is refutable.

(en adjective)

That which can be contested.

Some said he was the greatest of his time but with the amount of talent around that view was contestable

* ----

(-)

Able to be refuted, or shown to be false.

* irrefutable

* refutability