The article addresses that consideration as well:

> But here’s an objection: You might think these problems can be avoided if video review is used only to correct “clear and obvious” errors. This is the supposed standard for use of VAR in soccer. Things aren’t so simple, though, because there aren’t just borderline cases. There are borderline borderline cases. That is, it can be vague when the borderline cases start. It isn’t just that there is unclarity, but that there is unclarity about when the unclarity even begins.