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Universities track network activity. Downloading copyrighted material from torrent or direct-link sites can trigger DMCA notices, loss of campus network access, or even lawsuits (though rare for individual students, it does happen). Patched PDFs are a favorite vector for hackers

When the alternative is composite but has a monotone likelihood ratio (MLR) in a statistic (T(X)), the test that rejects for large values of (T) is UMP. The Karlin–Rubin theorem formalizes this for one‑parameter exponential families. loss of campus network access