A 96-sample sequence fails at injection 41. Inlet pressure drops from 12.4 bar to 8.1 bar within a single run, and only one of the last twelve vials produces a clean chromatogram. The supplier’s certificate says the lot passed a 0.8 mm septum puncture test. The lab’s contract says the supplier warrants that goods are “free from defects in material and workmanship.” Both statements are true. Neither tells you who pays for the 96 samples, the instrument downtime, or th...