If you and we fail to agree on the amount of loss, either may demand an appraisal. Each party will select a competent and disinterested appraiser. The appraisers will select a competent and disinterested umpire. If they fail to agree upon an umpire within fifteen days, either may request that selection be made by a judge of a court of record. The appraisers will separately set the amount of loss. If they fail to agree, they will submit their differences to the umpire. A decision agreed to by any two will be binding.