To rebut the mandatory inference of Pittman a carrier had to produce direct and positive proof that something other than the disability was the sole cause of claimant’s reduced <a href="https://thelomad.com/getmad.today/wp-contentwww.getmad.today/blog/2014/11/the-law-offices-of-melissa-a-day-pllc-won-a-finding-of-a-0-loss-of-wage-earning-capacity/">earning capacity</a> after retirement