There was also an irrefutable sadness in his eyes.

You have to be crazy to keep denying such an irrefutable truth!

We have irrefutable evidence of his guilt.

Even today, his theory remains practically irrefutable.

This is irrefutable proof that Mary is innocent.

A fact is, essentially, irrefutable.

This argument is irrefutable.

For him, his principles were irrefutable.

The proof is irrefutable.

There is irrefutable proof that Tom is innocent.