It's more that the courts would presume that the software was working correctly for the purposes of the evidence provided by it for the prosecution, unless evid

It's more that the courts would presume that the software was working correctly for the purposes of the evidence provided by it for the prosecution, unless evidence was presented otherwise by the other side. But of course when that's the default it's quite hard to get the access to collect that evidence, especially if you're an individual with limited funds (even more so if you got bullied into paying fines beforehand).