Affirmed. See Clement v. Rousselle Corp., 372 So.2d 1156, 1158 (Fla. 1st DCA 1979)(“A defendant who has answered with a general denial, is entitled to prove, and to argue to the jury, that the accident was due solely to the negligence of a person not party to the suit.”), cert. denied, 383 So.2d 1191 (Fla. 1980).