427 A.2d 328 Earl H. Roberts, Jr., Petitioner v. Commonwealth of Pennsylvania, Workmen’s Compensation Appeal Board and Carpenter Technology, Inc., Respondents. Commonwealth Court of Pennsylvania.Argued October 8, 1980 March 30, 1981. Workmen’s compensation — Final receipt — Burden of proof — Clear and convincing evidence — Credibility — Conflicting medical testimony — Equivocal testimony. 1. […]