The commissioner’s misapprehension concerning the time of the incident related by the customer is of little consequence, however, in view of his remaining conclusions, which are well supported by the evidence. Significantly, he concluded that the “employer’s termination of the [plaintiff] began within a short time of the [plaintiffs] first notifying the employer of his injury on the night of May 21,1995, as was manifested by the employer’s return phone call to the [plaintiff] at the business shortly after the [plaintiff] made the initial phone call, at which time the employer began to question the cause of [the plaintiffs] injury and deny that it could have happened as described by the [plaintiff].” Although the defendant may not have been wholly satisfied with the plaintiffs performance, he never indicated that he intended to discharge him until after he learned of the plaintiffs injury. As the fact finder, the commissioner had broad discretion in determining the facts. Nothing in the defendant’s presentation obligated the commissioner to conclude that the defendant had rebutted the presumption that arose from the plaintiffs prima facie case. The determination of factual issues depends largely on the fact finder’s evaluation of the credibility of witnesses and an appellate court must accept the fact finder’s resolution of those issues if it is reasonably supported by the evidence. Doyle v. Kulesza, 197 Conn. 101, 105, 495 A.2d 1074 (1985); Bead Chain Mfg. Co. v. Saxton Products, Inc., 183 Conn. 266, 276-77, 439 A.2d 314 (1981). The commissioner’s findings satisfy that standard. IV