The medical reports that Mr. Hillier mentioned earlier in relation to supporting a disability benefit are critically important. In the case you describe, those medical reports for injuries or incidents during service or work-related repetitive-strain injuries on the veteran's file are critically important in helping the disability benefit adjudicators to determine whether or not the injury was caused or aggravated by military service.
Taking the farming scenario, if the injury was deemed to have been caused primarily by the farming activities but then aggravated by service, and this can be demonstrated through the disability adjudication process, then there would be a favourable decision in that case.
We have medical advisors associated with our disability benefit program. They go through all of the medical and non-medical evidence in rendering a decision. Benefit of the doubt is critically important in making that attribution to service.