Simple logic

From a computer training I’m taking today:

“Error messages will only appear after the LCD has been initialized. If the LCD is initialized, this is an indication that the base system is working properly.”

At first glance, this appears to be reducible to: error messages will only appear when the base system is working.

You might think that makes no sense, but what you would be forgetting is that statement includes the word “base” – the base system is working. Silly computer tech, things can still go wrong, even wildly wrong, even though the base system is working.

That’s what separates logicians and untrained techs from the best and the brightest.