--- - |2 Abstract In this commentary, I advocate for strict relations between Marr's levels of analysis. Under a strict relationship, each level is exactly implemented by the subordinate level. This yields two benefits. First, it brings consistency for multilevel explanations. Second, similar to how a sculptor chisels away superfluous marble, a modeler can chisel a computational‐level model by applying constraints. By sculpting the model, one restricts the (potentially infinitely large) set of possible algorithmic‐ and implementational‐level theories. - Topics in Cognitive Science, Volume 10, Issue 3, Page 641-648, July 2018.