LOWER BOUND • DICTIONARY ONE.COM • Definition of Lower bound

... companies that were studied use as the basis for their blocking decisions. Moreover, in light of the flaws in these studies, discussed in detail in our findings of fact above, these percentages significantly underestimate the amount of speech that filters erroneously block, and at best provide a rough lower bound on the filters' rates of overblocking. Given the substantial amount of constitutionally protected speech blocked by the filters studied, we conclude that use of such filters is not narrowly tailored with respect ...

— Children's Internet Protection Act (CIPA) Ruling • United States District Court for the Eastern District of Pennsylvania