As earlier noted, everything about OS X (Lion) is opaque and depressing in the attempt to use it (particularly when even the Search function returns nonsensical and irrelevant information, such as how to search).
I’ll give myself another 24 hours to try to break out of this funk and see this thing as other than a punishment for trying to abandon my old iMac and OS 9.

In any case, I’ve taken steps to return the machine for a refund; Apple is sending me return shipping labels.

But before I do so, I’ll need to erase all (especially personal) information from the machine and have been told by Apple that the following is the appropriate procedure:

Reboot with command-R
Find Recovery HD
Open Disk Utility
Choose HD
Choose Erase

I need to know if this will completely clear everything I’ve put on the machine or that the machine has generated, both online and offline, without residue – ie, that no information can be recovered. So, if anyone out there can confirm that those instructions will do the trick, please let me know.