Cat
The domestic cat demonstrates remarkable biological durability, with an average lifespan of 15 to 20 years under optimal indoor conditions. Individual specimens have documented survival well into their thirties, outlasting multiple human relationships, several career changes, and countless items of furniture sacrificed to territorial marking behaviours.
Feline resilience extends beyond mere longevity. Cats survive falls from considerable heights through the so-called righting reflex, maintain functionality across wide temperature ranges, and demonstrate immune systems capable of processing dietary indiscretions that would hospitalise most mammals. The redundancy built into feline biology suggests engineering tolerances far exceeding domestic requirements.
Storage requirements prove minimal. Unlike perishable goods, cats maintain themselves at ambient temperature and require no special preservation techniques. They do, however, deteriorate emotionally if neglected, a form of spoilage that manifests in behavioural rather than physical symptoms.
Bread
Bread durability varies dramatically based on formulation and storage protocols. Standard white bread maintains optimal quality for five to seven days at room temperature before mould colonisation renders it unsuitable for consumption. Artisan sourdoughs extend this window marginally through natural acidity. Industrial products laden with preservatives push boundaries further still.
The fundamental fragility of bread has driven considerable innovation. Freezing extends viability to several months. Toasting rescues slightly stale specimens. The invention of breadcrumbs represents humanity's refusal to accept defeat even when the loaf has clearly expired. Yet despite these interventions, bread remains temporally limited in ways cats simply are not.
Archaeological evidence indicates that bread, once consumed, provides no further service. The cat, by contrast, continues generating value for decades following initial acquisition. From a pure durability standpoint, the mathematics favour the mammal decisively.