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See: heretic

INFIDEL, persons, evidence. One who does not believe in the existence of a God, who will reward or punish in this world or that which is to come. Willes' R. 550. This term has been very indefinitely applied. Under the name of infidel, Lord Coke comprises Jews and heathens; 2 Inst 506; 3 Inst. 165; and Hawkins includes among infidels, such as do not believe either in the Old or New Testament. Hawk. P. C. b 2, c. 46, s. 148.
     2. It is now settled that when the witness believes in a God who will reward or punish him even in this world he is competent. See willes, R. 550. His belief may be proved from his previous declarations and avowed opinions; and when he has avowed himself to be an infidel, he may show a reform of his conduct, and change of his opinion since the declarations proved when the declarations have been made for a very considerable space of time, slight proof will suffice to show he has changed his opinion. There is some conflict in the cases on this subject, some of them are here referred to: 18 John. R. 98; 1 Harper, R. 62; 4 N. Hamp. R. 444; 4 Day's Cas. 51; 2 Cowen, R. 431, 433 n., 572; 7 Conn. R. 66; 2 Tenn. R. 96; 4 Law Report, 268; Alis. Pr. Cr. Law, 438; 5 Mason, 16; 15 mass. 184; 1 Wright, 345; So. Car. Law Journ. 202. Vide Atheist; Future state.

References in classic literature ?
Yet, brother, take my advice, and file your tongue to a little more courtesy than your habits of predominating over infidel captives and Eastern bondsmen have accustomed you.
On the library table I noticed two of the "amusing books" which the infidel doctor had recommended.
Preparation by books had failed, owing to the doctor's infidel obstinacy.
Many infidels deny this creature's existence, but Semprello Aurator
He said, he doubted not but that all the infidels and hereticks in the world would, if they could, confine honour to their own absurd errors and damnable deceptions; "but honour," says he, "is not therefore manifold, because there are many absurd opinions about it; nor is religion manifold, because there are various sects and heresies in the world.
He tried to make us act plays and to enter into masquerades, in which the characters were drawn from the heroes of Roncesvalles, of the Round Table of King Arthur, and the chivalrous train who shed their blood to redeem the holy sepulchre from the hands of the infidels.
But how do you negotiate with Islamic militants who believe they have a mandate from God to enslave infidel women and girls and sell them at markets, who kill infidels who dare criticise Muhammad, prisoners who refuse to convert to Islam and defenceless people enjoying themselves in bars and clubs in Paris?
This means that it is forbidden to praise or glorify infidel players," Sheikh Al-Barrak ruled.
Omid was the winner of the Best Actor Award for his lead performance in The Infidel at the Turin Film Festival (won the previous year by Bill Murray).
During last week's visit, Salwa asked at the beginning if I did not fear being considered as an infidel by the Salafists in taking the risk to call on her to greet her on Christmas Day.
Mursi is an infidel and those who follow him are infidels," shouted one defendant.
It added that "the infidel republican system is the reason for the adversity the world is suffering from.