Purchasers of land developed by Holiday Intervals, Inc., signed writings in which they promised to pay a certain sum of money at a definite time in the future. However, according to the signed instruments, the payments were due only if specified structures were built in the complex within two years of the signings. Some of these instruments were labeled “promissory note.” Were any of the writings commercial paper? (In re Holiday Intervals, Inc., 94 Bankr. 594