Use Bryson for the definition and stage boundary; Rogers for the relocation case; Guglielmi for same-mash-bill divergence; Society of Wine Educators for concise tertiary corroboration; and Reigler PDF sheets 36–38 and 147–148 only as a Four Roses illustration.
Bryson — Grain types, proportions, and functional roles in American whiskey mash bills. — chap. 5, “There’s Magic in the Mash,” “Recipes”Bryson — The same mash bill can produce different whiskeys because other production variables interact. — chap. 5, “There’s Magic in the Mash,” “That’s the Same Whiskey.”Rogers — Proof — PDF sheet 95 — same recipe, different whiskeyGuglielmi — Warehouse H — PDF sheet 111 — same mash bill, different bourbonSociety of Wine Educators, CSS Study Guide, p. 116Cowdery — Bourbon, Straight — Chapter 16, “Something About Some Roses”Hyde 2022 — whiskey formulations and process examples — PDF sheets 266–301Reigler 2020 — multistage flavor model — “How to Taste Bourbon,” “Flavor Profile”Reigler 2020 — Four Roses recipe matrix — “The Master Distiller,” Four Roses laboratory comparison of mash bills and yeast strainsBroom 2014, pp. 234–235 — Maker's Mark linked controlsBroom 2014, pp. 236–237 — Brown-Forman portfolio variablesBroom 2014, pp. 242–243 — Buffalo Trace portfolio matrixBroom 2014, pp. 244–245 — Beam proof and placementBroom 2014, p. 246 — Four Roses component matrixMiller — Whisky Science — 81A mash bill defines the grain composition and proportions used for a whiskey, but it does not by itself determine the finished whiskey’s identity or sensory profile.
Bryson PDF sheets 103 and 105, Rogers PDF sheet 95, Guglielmi PDF sheet 111, and Reigler PDF sheets 36–38 and 147–148 were visually verified. The claim establishes the insufficiency of recipe alone; it does not quantify the contribution of each later variable.
Mash bill is still a major causal input and can constrain legal style. The evidence establishes that it is insufficient as a complete identity or flavor predictor; it does not quantify the contribution of each later stage.
Bryson defines mash bill as grain composition and explains why later production stages add interacting sources of difference. Rogers adds a Heaven Hill case in which a retained recipe did not reproduce identical new make after a change of site and equipment. Guglielmi independently explains why bourbons using one mash bill can diverge through entry proof, warehouse conditions, aging, individual oak barrels, and filtration.
Retained at Ready for Drafting/Strong/High. Reigler adds a guided recipe-matrix illustration with descriptor priming; not a controlled experiment but does not supersede stronger technical sources. Fresh Proof source audit: full supplied text read, evidence locators rechecked. Craig Beam reports his grandfather's observation. No blinded equivalence trial or isolated mechanism is supplied. This source-specific audit does not independently reverify other linked works or increase claim confidence.
Mash bills specify grain composition and proportionsA shared mash bill does not make two whiskeys identicalThe same recipe can yield different whiskey at a different distilleryMash bill alone cannot account for finished bourbon differencesMash bill names the grain formulation, not later transformationsCowdery — Four Roses recipes and component blending — Chapter 16, “Something About Some Roses”Whiskey recipes illustrate formulation rather than identityBourbon flavor is described as a multistage production outcomeFour Roses uses a two-by-five recipe matrix for controlled differentiationMaker's Mark links recipe, yeast, distillation, oak treatment, barrel rotation, and finishingBrown-Forman varies formulation and process across Early Times, Old Forester, and Woodford ReserveBuffalo Trace constructs a portfolio from recipes, distillation settings, warehouses, and placementJim Beam differentiates brands through proof and warehouse placement as well as recipeFour Roses builds ten components from two mash bills and five yeastsA trained panel did not reliably separate sampled bourbons and ryesClaim
A mash bill defines grain formulation, not finished whiskey identity.
Evidence
Bryson defines the mash bill and separates it from later production stages. Rogers reports that the same recipe yielded different new make after a distillery relocation. Guglielmi directly identifies entry proof, warehouse conditions, aging, individual oak, and filtration as reasons bourbons from one mash bill can differ.
Boundary
Grain composition remains a major causal input and may constrain legal style. The evidence establishes insufficiency, not irrelevance, and does not assign a percentage of final flavor to any stage.
Drafting guidance
Use mash bill as the beginning of the production explanation, then trace the interacting transformations that follow.
Reigler 2020 — source-contribution audit
Reigler PDF36–38 and147–148 support recipe insufficiency through explanatory and guided-comparison material. The comparison is descriptor-led, not a controlled experiment. The earlier 'controlled recipe-matrix' characterization has been corrected, and later transformations are described as interacting rather than independent.
Other-source evidence and existing claim status retained; this audit does not independently reverify every linked work or published use.