For very big and expensive projects that have an infrastructure part and a science part, like the LHC’s tunnel vs detectors, we try to avoid this by having mult

For very big and expensive projects that have an infrastructure part and a science part, like the LHC’s tunnel vs detectors, we try to avoid this by having multiple, separately-designed detectors at different intersection points. Hence the CMS and ATLAS detectors. Even though they share a beam, the rest of their systematics should be independent. They even unblinded their Higgs results together, to ensure neither used the other’s result as prior knowledge.