Surah XXV., I) because it distinguishes the true from the false. 
C. There are several weak points in your argument. Before you can rely on it, you  
have to prove, to yourselves in the first place, that the Qur'an is a revelation  
from God. This you cannot prove. Again, the title "Furqan" (whatever be the  
meaning of the word, which is really Syriac and Chaldee adopted into Arabic) is not given  
exclusively to the Qur'an, for in Surah XXI., Al Anbiya', 49, and Surah II., Al Baqarah, 50 1, the same title is given to  
the Taurat. Moreover, instead of using the Qur'an to test the Bible, as you say, you are  
bidden in the Qur'an itself to test the Qur'an by the Bible: for in Surah V., Al  
Maidah, 47-52 we read:"But how shall they make thee their judge, since they  
already possess the Law, in which are the behests of God? . . . Verily, We have sent down  
the Law, wherein are guidance and light. . . . And whoso will not judge by what God hath  
sent downsuch therefore are unbelievers. . . . And in the footsteps of the prophets  
caused We Jesus the Son of Mary to follow, confirming the Law which was before Him; and We  
gave Him the Evangel with its guidance and light, confirmatory of the preceding Law, a  
guidance and warning to those who fear God; and that the people of the Evangel may [or,  
let the people of the Evangel] judge