The Christian refutation of Muslim falsification claims relied entirely on biblical data.

Evidence

It was most improbable that the Jews should have been so careless; but if they had been, how could they have hidden it? How could a text have been kept secret and uncorrupt for a thousand years, in a form known to nobody, and then have been published in the falsified form? It was characteristic of this argument that it depended on the accuracy of historical data derived solely from the Bible. — Norman Daniel, Islam and the West, 277