(1) The inquisition shall be confined to the question whether or not the person who is the subject of the inquisition is, at the time of such inquisition, of unsound mind and incapable of managing himself or herself or his or her affairs, and no evidence as to anything done or said by him or her, or as to his or her demeanour or state of mind at any time, being more than 2 years before the time of the inquisition, shall be receivable in proof of unsoundness of mind on any such inquisition, unless the Court or Judge shall otherwise direct.