Comment So... Your Comma Splice (Score 1) 605
You wrote, "It is a 3rd year course, so students...". That should be either, "...course, and so..." or "...course; so...".
You wrote, "It is a 3rd year course, so students...". That should be either, "...course, and so..." or "...course; so...".
I use Discover's Secure Online Account Numbers all over the place. They are only good for the first merchant to charge them, and that merchant can charge indefinitely. You can cancel a single number any time. Charges go to your regular Discover account.
I found them to be a problem on Amazon, because regular purchases come from a "different" merchant than the one that MP3 downloads do and will get declined. So I just have two virtual cards on file and choose the appropriate one.
Quantum Mechanics is a lovely introduction to Hilbert Spaces! -- Overheard at last year's Archimedeans' Garden Party