Grumpy Old Geeks Topics Checking information and keeping copies Topic Checking information and keeping copies 2 mentions in 1 episode Brian urges listeners to corroborate claims and keep multiple copies of digital material. Mentions 2014 Year End Special Dec 26, 2014 9:33 if you don't have at least four sources, it isn't true. And if you don't have four copies, it doesn't exist. 9:51 Servers go away. Dropboxes disappear. Thrive's crash.