Guardianship of Jackson

In this appeal, the petitioners, the mother and father of Jackson, essentially challenge a Probate and Family Court judge’s findings (1) that they did not sustain their burden of demonstrating that, at the time of trial, their adult son was incompetent by reason of mental illness to manage his own personal and financial affairs; and (2) that they failed to show, by a preponderance of the evidence, that Jackson was not able to think or act for himself as to matters concerning his personal health, safety, and general welfare, or to make informed deci*769sions as to his property or financial…