396 "Something extremely bogus is going on. Was tested for covid four times today. Two tests came back negative, two came back positive. Same machine, same test, same nurse. Rapid antigen test from BD." (twitter.com) posted 156 days ago by twoterms 156 days ago by twoterms +397 / -1 14 comments share 14 comments share save hide report block hide child comments Comments (14) sorted by: top new old worst You're viewing a single comment thread. View all comments, or full comment thread. ▲ 1 ▼ – Marshall 1 point 156 days ago +1 / -0 A coin flip is 50% false positive and 50% false negative. For the test to be useful in any way, one has to have a false % under 50%. But if you don't have at least one good test, how can you determine whether the other tests are false? permalink save report block reply
A coin flip is 50% false positive and 50% false negative. For the test to be useful in any way, one has to have a false % under 50%.
But if you don't have at least one good test, how can you determine whether the other tests are false?