458 A.2d 313 John T. Mitchell, Jr., Petitioner v. Workmen’s Compensation Appeal Board (Townsend Bottum, Inc.), Respondents. Commonwealth Court of Pennsylvania. April 13, 1983. Workmen’s compensation — Causation — Unequivocal medical testimony — Hypothetical question. 1. In a workmen’s compensation case where there is no obvious causal connection between a claimant’s disability and his employment, […]