Some Assembly Required
In a discussion, when pointing out inconsistencies in your opponent’s opinion by giving two examples that you disagree with, remember that it can be made into a point against you, just by inverting the two examples – plus/minus some rhetorical decoration.
If you read about operating system security, it seems to be all about how many holes are discovered and how quickly they are fixed. If you look inside an OS vendor, you see lots of code auditing taking place. This assumes all security holes can be found and fixed, and that they can be eliminated more quickly that new ones are added. Stop fixing bugs already, and take security seriously!