In 3rd or 4th (1990ish) grade we had an amazing computer teacher, started out just drawing cool designs, then learned more, and ended up making a digital clock from scratch, meaning I had to create procedure to draw the numbers and a control program to trigger the process with time delays.
1. That the APA did transfer the copyrights, this argument was basically that they appeared to be included in the list of included assets meanwhile completely ignoring the fact that they were explicitly excluded in the list of assets which would not be transfered.
2. That even if they were not included in the APA it didn't matter because the people involved in the deal THOUGHT they were being transfered.
IMHO point #1 was meant to be a contradiction of SCO's strategy #2 and not so much an addressing of your point.