What would happen if you have a non-standard setup? For example, on my computer, I could show them `locate *.jpg`, but I doubt they would take my word for what that does. I think I have Gnome and Unity installed, which probably have GUI searches. Of course, I could always arrow down to my Windows installation at the grub boot screen, but than they would never know about all of the pictures I don't have on my main installation. Thats not even counting the encrypted loopback file I have, or the "/ram" directory I have which is hidden by the tmpfs filesystem mounted on top of it.

Of course, these are all without me trying to hide anything (the encrypted loopback is mostly a matter of principle, I don't actually have anything stored in it).