You truely are dense and stupid, and seeing that you dont read half of what I have said I'll spell it out for you.
1. I read the manual before diving, and only re read it when the buttons did not function correctly. I had already had several dives using the computer, and only went back to the manual after it started malfunctioning. As with any computer there is always the probability that it will malfunction, and this one has. It will be going back for repair, and hopefully the LDS will trade it out for something else.
2. I understood all the functions well before taking it diving. Go back and re read all my posts. After several hours on the plane playing with the comptuer and manual I think I had a pretty good understanding on how it works, however when it doesn't work the 1st thing you do is get out the manual. You say lack of safety, but cancelling a dive because of gear malfunction shows the opposite. Would you still dive on a malfunctioning computer?
Again you assume a lot in. I was in a group when I aborted the dive, and there were enough that the group still completed the dive, including my buddy. So while they spent a good hour diving I sat on the beach trying to figure out why the buttons did not work as they are supposed to. Even took out the battery, re read the manual and called the LDS I bought the computer from.
So keep assuming. You know what they say about people that assume. You should also reconsider your sig.